Human activities are altering the ph of the oceans causing major disturbance to many living organisms, w have also destabilised the coral reefs and almost distroyed other arts of marine ecosystem too
What are marine ecosystems?The largest aquatic ecosystems on Earth, marine ecosystems are found in waters with a lot of salt. These environments stand in contrast to freshwater ecosystems, which contain less salt. More than 70% of the Earth's surface is covered by marine waters, which also provide more than 97% of the planet's water supply and 90% of its habitable area. The salinity of seawater is 35 parts per thousand of water on average. Varying marine environments have different actual salinities depending on the water depth and coastline features, marine ecosystems can be separated into a variety of zones. The huge, open area of the ocean known as the oceanic zone is home to creatures like whales, sharks, and tuna. Many invertebrates live on substrates in the benthic zone, which lies below the water.
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Muscle cells make up muscle tissues, which are attached to each other and to bones. The main function of muscle cells is to move body parts and organs. They do this by contracting and relaxing, which changes the length and shape of the cells. This process uses several proteins and requires a lot of energy.
Which is the best prediction about the cell structures of muscle cells?
A.
Muscle cells have a large volume of cytoplasm so that the cell can easily change shape.
B.
Muscle cells contain a large number of mitochondria in order to provide more energy.
C.
Muscle cells do not have nuclei because they do not need to produce proteins.
which best describes how atp synthase converts the potential energy of the proton gradient to the chemical energy of atp?
Option C is correct. Kinetic energy from the proton flux is converted into rotational kinetic energy in the F0 subunit. Rotation of the F0 subunit results in rotation of the F1 subunit, which can catalyze ATP synthesis.
What is ATP synthase?ATP synthase is an inner membrane-located mitochondrial enzyme that catalyzes the synthesis of ATP from ADP and phosphate. It is driven by the flow of protons through a gradient caused by electron transfer from chemically positive protons to the negative side.
How does ATP synthase work?ATP synthase is a complex that utilizes the proton potential generated by the action of the mitochondrial electron transport system. It transports protons along the gradient and uses energy to complete the phosphorylation of ADP to ATP.
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Which of the following BEST describes how ATP synthase converts the potential energy of the proton gradient to the chemical energy of ATP? Do protons flow through the F0 or F1?
A. Kinetic energy from the flow of protons is stored in a new electrochemical gradient within the F0 subunit. The potential energy of the electrochemical gradient, in turn, is converted to kinetic energy in the F1 subunit and used to catalyze ATP synthesis.
B. The flow of protons through the F0 subunit oxidizes the F1 subunit, which allows ADP to be reduced to ATP.
C. Kinetic energy from the flow of protons is converted to the kinetic energy of rotation of the F0 subunit; the rotation of the F0 subunit leads to rotation of the F1 subunit, which can then catalyze ATP synthesis.
D. None of the other answer options is correct.
E. The flow of protons through the F0 subunit reduces the F1 subunit, which allows ADP to be oxidized to ATP.
What determines where an organism lives?
All of the environmental requirements are met by the habitat for an organism to survive.
An organism chooses its home when it can find everything it requires.
The habitat is impacted by the air, water, temperature, climatic conditions, local flora, and animals.
For instance, plants have transformed their leaves into spines to prevent excessive water loss, which is a hallmark of organisms living in deserts.A habitat means a lot and everything to an organism as it requires in order to locate and gather food, choose a mate, and procreate successfully. The most suitable habitat for a plant must have the ideal mixture of light, air, water, and soil.
The process by which organisms choose the locations they might inhabit and use for a while is known as habitat selection.
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what is the megagametophyte also know as in angiosperm reproduction?
In angiosperm reproduction, the megagametophyte is the female gametophyte.
Meiosis, also known as reduction division of the diploid egg cell, is what produces this gametophyte. It is the tiniest gametophyte and consists of only a few cells.
Two or three polar nuclei, an egg cell, and two or three antipodal cells make up the megagametophyte. The megagametophyte is the one that the male gametophyte (the pollen grain) fertilises in order to create the zygote, which later gives rise to the embryo.
The synergids and the endosperm are two more cell types that the megagametophyte generates. The synergids, which are situated close to the egg cell, help the sperm enter the egg.
The embryo receives food and sustenance from the endosperm, which is the nutritive tissue. In angiosperm reproduction, the megagametophyte is the female gametophyte and is in charge of the zygote's growth and the sustenance of the embryo.
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how do epidemiologists determine the cause of an epidemic
Using statistical analysis epidemiologists determine the cause of an epidemic.
Epidemiologists conduct research to establish the factors that lead to public health issues, the appropriate responses, interventions, and solutions. By using research—from the field and in the lab—and statistical analysis, epidemiologists can track disease and predict its future outcomes. The three major epidemiologic techniques are descriptive, analytic, and experimental. Although all three can be used in investigating the occurrence of disease, the method used most is descriptive epidemiology.
The purpose of the epidemiologic investigation is to identify a problem, collect data, formulate and test hypotheses. It involves the collection and analysis of more facts or data to determine the cause of illness and to implement control measures to prevent additional illness.The Centers for Disease Control and Prevention (CDC) describes an epidemic as an unexpected increase in the number of disease cases in a specific geographical area. Yellow fever, smallpox, measles, and polio are prime examples of epidemics. An epidemic disease doesn't necessarily have to be contagious.
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Alpha-linolenic acid and linoleic acid are ________ fatty acids.
Alpha-linolenic acid and linoleic acid are Polyunsaturated fatty acids (PUFA). These amino acids contain multiple unsaturated bonds.
What are the Polyunsaturated fatty acids (PUFA)?Polyunsaturated fatty acids (PUFA) are the fatty acids which contain more than one double bond in their backbone structure. This class of fatty acids include many important compounds, such as essential fatty acids and those which give drying oils their characteristic property.
Essential fatty acids are the fatty acids which cannot be synthesized in the body. Alpha-linolenic acid and linoleic acid are the polyunsaturated fatty acids (PUFAs) which are present in the food.
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which word means that a cell has two copies of each chromosome?
The term for a cell having two copies of each chromosome is diploid.
In diploid cells, one copy of each chromosome is inherited from each parent during sexual reproduction, resulting in a full complement of paired chromosomes. Most somatic (non-reproductive) cells in the human body are diploid, with 46 chromosomes in total (23 pairs).
In diploid cells, one copy of each chromosome is inherited from each parent during sexual reproduction, resulting in a full complement of paired chromosomes. This is because diploid cells undergo sexual reproduction, which involves the fusion of two haploid cells, each of which contains only one copy of each chromosome. When the two haploid cells combine, their chromosomes pair up to form a diploid set.
Most of the cells in the human body, with the exception of reproductive cells, are diploid. This means that they have a full complement of 46 chromosomes, arranged in 23 pairs. The diploid nature of our cells allows for genetic diversity and variability, as the genetic material inherited from both parents can recombine in unique ways during cell division.
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which step occurs in the p site of the ribosome during translation? question 15 options: an incoming charged trna binds to this site. the trna carrying the growing polypeptide moves to this site as the ribosome slides to the next codon. an uncharged trna is ejected from this site as the ribosome slides to the next codon. none of the other answer options is correct.
As the ribosome glides to the following codon, the tRNA carrying the expanding polypeptide moves to the this location.
As the ribosome moves to the following codon, an unindicted tRNA is expelled from this location.The expanding polypeptide of amino acids is held in place by the tRNA by the P site, also known as the peptidyl site. The new amino acid that will be added to a polypeptide is stored in the aminoacyl tRNA, where a The site (acceptor site) binds to. An incoming charge tRNA would attach at the A site following the initial engagement of first tRNA just at P site. The first tRNA's (Met) amino acid will be transferred to the second tRNA's amino acid through the establishment of a peptide bond (in this case, Trp).
(Which step occurs in the P site of the ribosome during translation?
- The tRNA carrying the growing polypeptide moves to this site as the ribosome slides to the next codon.
- An incoming charged tRNA binds to this site.
- None of the other answer options is correct.
- An uncharged tRNA is ejected from this site as the ribosome slides to the next codon.)
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Which one of the following can lead to changes in chromatin structure and is often associated with activation of transcription?
a) addition of methyl or acetyl groups to lysines located in the histone tail
b) methylation or acetylation of the phosphodiester link between cytosine and guanine
c) methylation of RNA polymerase
d) addition of lysine to CpG sites along the histone tail
e) the presence of cytosine and guanine in a repeating sequence in the histone tail
DNA becomes less accessible to transcription factors as chromatin is compressed into the main nucleosome form. However, when this chromatin structure becomes more lax, transcription is encouraged because the access of the transcription machinery to the genomic DNA is improved.
All RNA polymerase II-mediated features of transcription are significantly hampered by chromatin shape. Through a number of mechanisms, such as histone modification, chromatin remodelling, histone variant inclusion, and histone eviction, the dynamics of chromatin structure are closely regulated. Heterochromatin structure can change as a result of epigenetic alterations to histone proteins, such as acetylation and deacetylation, which can activate or repress transcription. The compound of DNA and proteins found in eukaryotic cells' nuclei is called chromatin. Thus, chromatin modifications are necessary for gene expression.
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_____ results from the activities of the nervous or endocrine system.
A) Self-regulation
B) Automatic regulation
C) Intrinsic regulation
D) Extrinsic regulation
E) Autoregulation
The correct answer is option E) Autoregulation. Autoregulation is an organism's capacity to keep its internal environment and physiological functions within a defined range despite changes in the environment.
It is accomplished by the neurological and endocrine systems' operations. Internal conditions including temperature, pH, oxygen, and carbon dioxide levels are controlled through autoregulation.
Controlling physiological processes including heart rate, breathing, vasoconstriction, and vasodilation is how this is accomplished. While the endocrine system employs hormones to govern body functions, the nervous system uses electrical impulses to control muscles and hormones.
To maintain homeostasis, which is the body's capacity to maintain a steady internal environment in spite of external changes, autoregulation is crucial. The body needs autoregulation to perform at its best and to survive.
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what results after a speciation event? what results after a speciation event? one new species evolves, while the original species may stay the same or evolve into something different. one new species evolves, while the original species goes extinct. two species have evolved that are each different from the original species. one new species evolves, while the original species stays the same.
the results after a speciation event one new species evolveses while original may stay the same or evolve into something different
After a speciation event, two species have evolved that are each different from the original species. Speciation is the evolutionary process by which new biological species arise. It occurs when a population of organisms becomes isolated from other populations, and over time, the genetic and/or phenotypic differences between the two populations accumulate to the point that they can no longer interbreed and produce viable offspring. This process results in the formation of two distinct species that are each different from the original species. While the original species may still exist, it will have undergone some amount of genetic or phenotypic change to become distinct from the newly formed species.
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bar graph showing all the organic compounds in an egg.
The organic compounds in an egg are: Fat: 33%, Protein: 18%, Carbohydrates: 0.03%, Cholesterol: 0.2%, Vitamins: 5%, Minerals: 5%, Triglycerides: 16%, Phospholipids: 17%, Other: 6%
What is organic compounds?
Organic compounds are compounds that contain at least one carbon atom. They can be found in both living and non-living things, such as in plants, animals, and even rocks and soil. Organic compounds are essential for life, as they make up proteins, carbohydrates, and other molecules that are necessary for life. They are also important for many industrial processes, such as in the production of plastics, rubbers, and drugs. Organic compounds are made up of molecules that contain carbon, hydrogen, and other elements, such as oxygen and nitrogen.
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What happens to the hybrid zone when gene flow is established?
Hybrids cease to be formed. gene flow between distinct gene pools. mixed ancestry. genetic background to integrate
Hybrids cease to form when gene flow gets established.
What is a hybrid zone?A hybrid zone is the area where the ranges of two interbreeding species or divergent intraspecific lineages intersect and cross-fertilize. Hybrid zones can occur in-situ as the consequence of a new lineage's evolution, although they typically do so as a result of parental forms interacting with one another after a period of geographic isolation that allowed for their growth (or speciation). For studies on the genetics of speciation, hybrid zones can provide instances of differentiation and (sometimes) gene flow across populations that are halfway between representing a single species and multiple species in reproductive isolation.
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Based on the functional roles of phosphate in various microbial metabolisms, deduce which compounds phosphate exists as in microorganisms.
A) organic compounds
B) inorganic compounds
C) both organic and inorganic compounds
D) neither organic nor inorganic compounds
D) Infer that phosphate exists in both inorganic and organic molecules in microorganisms based on its functional functions in different microbial metabolisms.
All living things need phosphorus (P) for metabolism, energy transfer, and the production of genetic & cellular components. By mineralizing organic P, dissolving inorganic P minerals, or storing significant amounts of P in biomass, phosphate solubilizing microorganism (PSMs), a vast microflora that mediates bioavailable soil P, play a crucial role in the soil P cycle. All living cells contain phosphorus, which is primarily found in the orthophosphate form but is also found in trace amounts as pyrophosphate. Phosphorus is crucial for cell metabolism. Inorganic phosphate is one of the nutrients that living things need the most (Pi).
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why are natural killer cells considered to be part of the innate immune response?
Natural killer (NK) cells are considered to be part of the innate immune response because they are able to respond quickly to a wide variety of pathogens and abnormal cells without prior exposure to them. This is in contrast to the adaptive immune response, which involves the activation and proliferation of antigen-specific T and B cells.
NK cells are able to recognize and eliminate infected or abnormal cells, such as those infected with viruses or cancer cells, through a process called "cell-mediated cytotoxicity." This involves the release of toxic substances, such as perforin and granzyme, that can directly kill the target cell. NK cells are also capable of producing cytokines, which are signaling molecules that can stimulate the activity of other immune cells and help to coordinate the immune response. Importantly, NK cells do not require prior exposure to a specific pathogen or antigen in order to be activated, and they are able to respond quickly to a wide variety of different pathogens and abnormal cells. This is what makes them an important part of the innate immune response.
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how well an organism survives and reproduces in its environment can be described as its
The ability of an organism to survive and reproduce in its environment is referred to as fitness .
Darwin claimed that fitness is impacted by individual adaptation differences. The ability of an organism to survive and reproduce in its environment is referred to as fitness. High fitness is the term used to describe people who have environmental adaptations that allow them to live and reproduce. Low fitness refers to an individual's tendency to die without reproducing or to produce few offspring when their characteristics are not well suited to their environment. By natural selection, the nature of the species gradually changes to become adapted to the niche. If a species becomes very well adapted to its environment, and if the environment does not change, species can exist for a very long time before they become extinct.
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the accompanying figure is a pedigree of a fairly common human hereditary trait; the boxes represent males and the circles represent females. filled in symbols indicate the abnormal phenotype. given that one gene pair is involved, what is the inheritance pattern of the trait?
Give the genotype of II1 and III2. If more than one genotypic possibility exists, present all possible alternatives.
The figure shows the autosomal recessive inheritance pattern of traits. The possible genotype of II1 is "Aa", and the genotype of III2 can be either "Aa" or "AA".
Autosomal recessive inheritance is a type of genetic inheritance pattern where a trait or disorder is only expressed when an individual has inherited two copies of the same recessive allele from their parents. This means that an affected individual's parents must both be carriers of the recessive allele. Carriers have only one copy of the recessive allele and do not show any symptoms of the disorder. Autosomal recessive disorders affect both males and females equally.
In Autosomal recessive inheritance, “a” is the mutated and “A” is the non-mutated allele of the gene. An individual who receives mutated alleles from both parents (aa) would be affected by the disease. The person with genotypes “AA” and “Aa” does not show phenotypes of disease.
As the offspring are affected, genotype II1 should contain a recessive allele; yet, it cannot have two recessives since it is unaffected. As a result, the only genotype for II1 that is possible is one in which one is the dominant allele and the other is the recessive allele (Aa). Since III2 is unaffected by the condition, it would not contain two recessive alleles. As a result, "Aa" or "AA" are the genotypes that III2 might have.
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The correct question is given as:
The accompanying figure is a pedigree of a fairly common human hereditary trait; the boxes represent males and the circles represent females. Filled-in symbols indicate the abnormal phenotype.
Given that one gene pair is involved:
a) what is the inheritance pattern of the trait?
b) Give the genotype of II1 and III2. If more than one genotypic possibility exists, present all possible alternatives.
Aseptic technique means that that you perform the preparation of media or the transfer.....a. of living microbesb. uniformly and consistentlyc. without introducing contaminationd. only with pathogense. under completely sterile conditions
Aseptic technique means that that you perform the preparation of media or the transfer c. without introducing contamination.
In order to prevent hazardous bacteria from contaminating sterile materials and surfaces, a series of processes known as aseptic technique is employed in microbiology, cell culture, and medical treatments. Maintaining a sterile environment is essential because contamination can compromise the reliability of research findings or result in an infection during medical treatments.
Maintaining a clean, contaminant-free environment and preventing the entrance of bacteria, viruses, fungi, or other microbes into the sterile field are the fundamental objectives of aseptic technique.
All individuals involved in the procedure put on the proper personal protective equipment and the work environment is cleansed and disinfected.
Sterilization: To sanitize the tools and materials used, a variety of techniques, including chemical sterilization, autoclaving.
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how does aquaculture affect worldwide seafood catch
The existing scientific data suggests that some forms of aquaculture are on a destructive course that endangers not only the long-term viability of the industry but also the wild fish stocks.
What is aquaculture?Aquaculture (less usually spelled as aquiculture) is the controlled production of aquatic animals like fish, crustaceans, mollusks, algae, and other important organisms like aquatic plants (e.g. lotus). Aquaculture is the practise of growing populations of freshwater, brackish water, and saltwater species under controlled or semi-natural conditions, in contrast to commercial fishing, which also entails the capture of wild fish. Mariculture, or marine farming, is the term used to describe aquaculture that takes place in ecosystems and lagoons with seawater as opposed to freshwater aquaculture. Pisciculture, a subset of aquaculture, is the practise of growing fish for human use.
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Plants produce their own food by the process of photosynthesis. True or false and why
The statement "Plants produce their own food by the process of photosynthesis" is true.
What is photosynthesis?Photosynthesis occurs in the stomata of leaves of plants. They make glucose and oxygen.
All autotrophic organisms including plants, plankton, and others have photosynthesis as a distinctive characteristic. In the presence of sunshine, organic food is synthesized using an inorganic source, of carbon dioxide.
Plants are autotrophs, and they contain a green pigment called chlorophyll, which helps them to make their own food with sunlight, carbon dioxide, and water.
Therefore, the statement is true.
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The systematic study of how biology affects human social behavior is called
- sociobiology
"Sociobiology" is the methodical study of how biology influences human social behavior.
SociobiologySociobiology is a branch of biology that looks at the biological underpinnings of social behavior in both humans and animals, including the evolutionary and genetic influences on communication, collaboration, and conflict resolution.The word "sociobiology" was initially used in the 1970s by biologist Edward O. Wilson, who believed that natural selection and genetic variables might be used to explain social behavior in animals, including humans. Wilson's work generated controversy because it implied that socialisation, including human behavior, had a biological base in addition to being influenced by cultural and environmental influences.Scientists are still debating and researching sociobiology today, with some wondering how much biological elements may account for sophisticated social behaviour in humans. Despite this, sociobiology has aided in our comprehension of the genetic and evolutionary roots of social behavior and has sparked fresh investigation and insights in the disciplines of psychology, anthropology, and neuroscience.learn more about sociobiology here
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why is it important to tetrapod hormonal function that, before aldosterone even evolved, one copy of the duplicated mineralocorticoid receptor (m receptor) lost the ability to bind aldosterone but retained the ability to bind cortisol?
The cortisol signalling is hampered if both versions of the receptor bind to both hormones.
The emergence of aldosterone would likely have interfered with cortisol signalling if both versions of the receptor could still bind both hormones.
The glucocorticoid receptor controls how the body will react to stress, even though cortisol is a blatant indicator that stress is present. A pathway that affects the production of specific stress-response proteins is activated when cortisol binds to the glucocorticoid receptor. The main mineralocorticoid hormone in tetrapod vertebrates is aldosterone, which is essential for controlling sodium transport across epithelia. The glucocorticoid hormones cortisol and/or corticosterone control metabolic processes.
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The above question is incomplete. Check complete question below -
why is it important to tetrapod hormonal function that, before aldosterone even evolved, one copy of the duplicated mineralocorticoid receptor (m receptor) lost the ability to bind aldosterone but retained the ability to bind cortisol?
A. The evolution of the M receptor involved gene sharing rather than gene duplication, so both receptors did not need to bind both hormones.
B. The amino-acid sequences of the two versions of the receptor suggest that each can bind only a single hormone.
C. If both versions of the receptor could still bind both hormones, then the appearance of aldosterone would probably have disrupted cortisol signaling
D. None of the above
the upper layer of warm, less dense water is referred to as the the upper layer of warm, less dense water is referred to as the epilimnion. benthic zone. hypolimnion. thermocline.
The upper layer of warm, less dense water in a lake is referred to as the epilimnion. This layer is generally the warmest and most well-mixed part of the lake, and it is usually located near the surface.
The temperature of the epilimnion varies with the season, but it is generally warmer than the deeper layers of the lake.
The epilimnion is separated from the deeper, colder water by a layer called the thermocline. The thermocline is a narrow layer in which the temperature changes rapidly, and it marks the transition between the warm, well-mixed epilimnion and the colder, less well-mixed hypolimnion. The hypolimnion is the deepest layer of the lake, and it is usually the coldest and least well-mixed.
In addition to the epilimnion, thermocline, and hypolimnion, many lakes also have a benthic zone, which refers to the bottom sediments and the organisms that live there. The benthic zone is an important part of the lake ecosystem, as it provides habitat for many species and serves as a sink for nutrients and other materials that are transported from the surface of the lake.
Question: The upper layer of warm, less dense water is referred to as the
A.) thermocline.
B.) hypolimnion.
C.) epilimnion.
D.) benthic zone
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a genetic mutation preventing the production of the enzyme tyrosinase would result in the condition known as
A genetic mutation preventing the production of the enzyme tyrosinase would result in the condition known as Oculocutaneous albinism
Oculocutaneous albinism (OCA) is an uncommon genetic illness characterized by a decrease or complete absence of melanin pigment in the skin, hair, and eyes. Mutations in certain genes required for the generation of melanin pigment in specialized cells called melanocytes cause these diseases.
Oculocutaneous albinism is a type of albinism that affects the eyes (oculo-), skin (-cutaneous), and hair. Oculocutaneous albinism affects around one in every 20,000 people worldwide.
OCA is caused by abnormalities in many genes that govern melanin synthesis within melanocytes.
There are seven kinds of oculocutaneous albinism, all of which are caused by a breakdown in melanin synthesis and are all autosomal recessive illnesses.
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when two or more monomers join together to form a polymer, water is produced. this is called what?
When two or even more monomers combine to create a polymer, the process known as dehydration synthesis, also known as condensation reaction, takes place.
The condensation reaction, also known as the dehydration synthesis, involves joining two or even more monomers to produce a polymer. During this reaction, a water molecule is lost. In this response, a covalent bond is created between the hydroxyl (-OH) and hydrogen (-H) groups of two monomers, resulting in the creation of a larger molecule. Dehydration is a critical step in the synthesis of many biological components, such as proteins, nucleic acids, as well as carbohydrates. It is also used in the manufacture of synthetic polymers such as nylon, polyester, as well as other plastics. Understanding dehydration synthesis is necessary to comprehend the synthesis of biomolecules from simpler building blocks.
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Which plant organelle transforms light into glucose to use as food?
The plant organelle that transforms light into glucose to use as food is the chloroplast. Option C is correct.
Chloroplasts are specialized organelles found in the cells of green plants and algae that contain the green pigment chlorophyll, which allows them to absorb light energy.
Through the process of photosynthesis, chloroplasts convert light energy into chemical energy in the form of glucose and other organic molecules, which can be used by the plant as a source of food and energy.
Chloroplasts produce energy through the photosynthesis and oxygen-release processes, which sustain the plant growth as well as crop yield. As such, chloroplasts are responsible for the biosynthesis of the active compounds such as amino acids, vitamins, lipids, phytohormones, nucleotides, and secondary metabolites.
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--The given question is incomplete, the complete question is
"Which plant organelle transforms light into glucose to use as food? Options A) Cell wall B) Mitochondria C) Chloroplast D) Vacuole"--
A bioengineer and physician claim to have designed and successfully implanted an artificial kidney into a patient with kidney failure. Which of the following would be a reason that the scientific community might reject this claim?
The tissues must match that of the target patient.
Is it possible to design and implant an artificial kidney?Several different types of artificial kidneys are currently being developed, including those that use microchip technology and those that rely on natural or synthetic materials to mimic the functions of the kidneys.
However, designing and implanting an artificial kidney is a complex and challenging task that requires a deep understanding of the biology and physiology of the kidneys, as well as expertise in materials science, biocompatibility, and bioengineering. It is not easy because the tissues must match that of the target patient.
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Which evidence is consistent with the asteroid impact hypothesis? A. shock quartz in the K-T boundary layer B. tektites, a type of molten rock C. spherules, glassy beads in the K–T boundary layer D. iridium
All of the options listed (A, B, C, and D) are consistent with the asteroid impact hypothesis. The asteroid impact hypothesis proposes that the mass extinction of the Cretaceous period was caused by a massive asteroid impact on the Earth.
A. Shock quartz in the K-T boundary layer: Shocked quartz is a type of quartz crystal that has been deformed by the extreme pressure and temperature of an impact event. This is often found in the boundary layer between the Cretaceous and Tertiary periods (known as the K-T boundary), which is thought to represent the time of the asteroid impact.
B. Tektites: Tektites are small, glassy beads that are formed by the melting and rapid cooling of terrestrial rocks during an impact event. Tektites are often found in areas that have been affected by a large impact, and they have been found in sediments associated with the K-T boundary.
C. Spherules: Spherules are small, glassy beads that are formed by the melting and vaporization of the target rock during an impact event. Spherules have been found in sediments associated with the K-T boundary, and they are thought to be the result of the impact that caused the extinction event.
D. Iridium: Iridium is a rare element that is found in higher concentrations in asteroids and comets than in the Earth's crust. An abnormally high concentration of iridium has been found in sediments associated with the K-T boundary, providing strong evidence for an extraterrestrial impact.
Taken together, these lines of evidence strongly support the asteroid impact hypothesis as the cause of the mass extinction event at the end of the Cretaceous period.
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chloroplasts are known for all of the following except being
chloroplasts are known for all the following except being responsible for cellular respiration. A sequence of chemical processes known as cellular respiration convert glucose into ATP, which can then be used as energy for a variety of bodily functions.
Chloroplasts and plastids are membrane-bound organelles that play a significant role in photosynthesis in plant and algal cells. While processing solar energy and storing it in the energy-storing molecules ATP and NADPH, the photosynthetic pigment chlorophyll also releases oxygen from water in the cells. The Calvin cycle is a mechanism that turns carbon dioxide into organic molecules by using ATP and NADPH. Fatty acid, amino acid, and immune system synthesis are all produced by plant chloroplasts.
The complete question is:
Chloroplasts are known for all the following except being:
a) Photosynthesis
b) cellular respiration
c) Energy conservation
d) All
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which of the following describes one of the functions of lipids in living organisms? multiple choice question. store genetic information used to make proteins provide a short-term source of energy provide long-term storage of energy transport oxygen in the bloodstream
Your body uses carbohydrates as its primary energy source to power your heart, kidneys, brain, myocardium, and central nervous system.
For instance, fibre is a carbohydrate that promotes healthy blood cholesterol levels, helps with digestion, and makes you feel full. How Carbohydrates Work. energy provision and control over blood sugar. protein used gently to create energy. fatty acid degradation and ketosis prevention. Process of biological recognition. sweeteners and tastes. fibre. Lipids and carbs are both used to store energy. Carbohydrates are utilised for short-term storage, but lipids are used for long-term storage and may hold twice as much energy. In human bodies, proteins have numerous functions. They are utilised for metabolic processes, body function coordination, and tissue growth and repair. Additionally, they keep the right pH and fluid balance.
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