An ecosystem's keystone species contributes to its definition. The ecosystem would either cease to exist or would be drastically altered without its keystone species.
A species that plays a vital role in defining an ecosystem is known as a keystone species. This sea star contributes to the maintenance of healthy seaweed populations and the communities of sea creatures, sea urchins, limpets, and bivalves that consume them by controlling the population of mussels and barnacles. Complete Resolution. The right response is Species that shape their environment for themselves and other species by constructing, changing, or preserving physical habitat. An organism known as a keystone species contributes to the stability of the system. A keystone species is one that, in relation to its relative abundance, has an outsized impact on its surroundings. A foundation species, on the other hand, is typically only a principal source that predominates an ecosystem in terms of quantity and effect.
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_____ are alternative forms of a gene that govern the same feature, such as flower colour, and occupy corresponding positions on homologous chromosomes.
a. Alleles.
b. Loci.
c. Homozygotes.
d. Coupled traits.
e. None of these.
Alleles are different forms of a gene that control the same characteristic, like flower color, and they sit in the same places on homologous chromosomes.
The alternative form or variations of a gene are referred to as "alleles." Each parent transmits one allele per autosomal gene to their offspring, and we routinely classify these alleles. A gene can have two or more alleles, which are variations of it, and they can all occur at the same spot on a chromosome, or locus. The occurrence of many alleles for a certain trait is referred to as "heterozygous" in genetic terminology. If the two copies of the gene are different from one another, you have a heterozygous genotype.
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thin contractile protein involved in cross-bridge formation, comes in filamentous or globular forms. t/f
Thin contractile protein that are involved in the formation of crosslinks and exist in fibrous or globular form is actin.
What is the function of actin and its location?Actin is a highly abundant intracellular protein present in all eukaryotic cells and plays an important role in muscle contraction and cell movement. Actin also participate in maintaining and controlling cell shape and structure.
Actin is found in both the cytoplasm and nucleus. Its position is regulated by a cell membrane signaling pathway that integrates stimuli received by the cell and stimulates reorganization of the actin network in response.
What two proteins are contained in actin?Increased Ca2+ concentrations signal muscle contraction through the action of two accessory proteins bound to actin filaments: Tropomyosin and Troponin. Tropomyosin is a filamentous protein that binds longitudinally along the grooves of actin filaments.
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1. Using a good compound light microscope with a resolving power of 0.3 µm, 10X ocular lens, and a 100X oil immersion lens. Would you be able to discern two objects separated by 3 µm? 0.3 µm? 300 nm?
Using a good compound light microscope with a resolving power of 0.3 µm, 10X ocular lens, and a 100X oil immersion lens. You would be able to discern two objects separated by 3 µm, 0.3 µm, 300 nm.
Discerning two objects separated by 3 µm?You would be able to discern two objects separated by 3 µm, 0.3 µm and 300 nm.
It is important to note that the resolving power of the microscope by making use of its strongest lens is 0.3 µm, this implies that the microscope will be able to see difference objects that are 0.3 µm as well as object that are higher or greater than 0.3 µm.
Based on this since 300 nm is is the same as 0.3 µm the microscope will be able to see the objects.
Therefore we can conclude that the microscope will see all the three objects.
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What is one way to keep an operation pest-free? a. deny pests acces the operation b.clean up food spills at the end of each shift c. keep outdoor garbage containers open d.store food and supplies one inch of the floor in storage
One way to keep an operation pest-free is deny pest access the operation.
What does pest free mean?
An area where a particular pest is not present, as shown by scientific evidence, and where this condition is, if applicable, being formally maintained.
How do I keep Operation pest free?
Eliminate all dietary, water, and shelter resources.Items should be kept in secure, closed containers.Regularly dispose of trash with a lid that is securely closed.Remove any debris or hiding places for bugs.Any gaps or holes should be filled in and sealed to prevent outside access.What are the 4 types of pest control?
Chemical pest management. The chemical technique uses chemical treatments to ward off pests of all kinds.Organic pest control. Utilizing living things to reduce the population of pests is known as biological control.Electronic Pest Control.Physical Pest Control.To know more about pest control, visit:
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which of the following best represents the dna of the two daughter cells produced when a bacterial cell with this particular mismatch replicates its dna and divides?
Once Replication Errors Turn Into Mutations. After the subsequent cell division, incorrectly matched nucleotides that are still present after mismatch repair undergo irreversible mutation.
This is because the cell no longer perceives such errors as errors once they have been established.
If mistakes are made during DNA replication and they are not immediately fixed, mutations may result. Additionally, exposure to environmental elements including smoking, sunshine, and radiation can result in mutations.
Semi-conservative replication of DNA is used. This implies that each new DNA molecule has one strand from the parent molecule and one freshly produced complementary strand (daughter strand).
Since DNA polymerase needs an RNA primer, DNA replication will begin immediately to the left of the RNA.
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What are the structures that build proteins where are they located?; Which cellular structure makes proteins for the cell?
The cell structures where proteins are made are called ribosomes. Ribosomes are organelles made of ribosomal RNA (rRNA) and protein. The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function.
They exist in the cytoplasm of the cell and are the site of protein synthesis in all cells. The cell structures where proteins are made are called ribosomes. Ribosomes are organelles made of ribosomal RNA (rRNA) and protein. They exist in the cytoplasm of the cell and are the site of protein synthesis in all cells.
Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that can be combined to make a protein. Ribosomes are the sites in a cell in which protein synthesis takes place. Cells have many ribosomes, and the exact number depends on how active a particular cell is in synthesizing proteins.
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fat-soluble vitamins must be incorporated into lipoproteins or bound to transport proteins in order to be transported in the aqeous environment of the blood. the fat-soluble vitamins include vitamins
A, D, E, and K vitamins are among the fat-soluble vitamins.
What is Fat-soluble vitamins ?
Vitamins are essential micronutrients that our bodies cannot produce on their own or in sufficient amounts, so the main way we obtain them is through our diet. Both water-soluble and fat-soluble vitamins exist. A, D, E, and K are some of the fat-soluble vitamins. Fat-soluble vitamins are essential for many physiological functions, including vision, bone health, immune system, and clotting. In this review, the biochemistry, transport, and functions of these vitamins are discussed, with a focus on deficiency syndromes and potential toxicity.
Fat-soluble vitamins differ structurally, but due to their low solubility in hydrophilic media, they are similarly absorbed and transported. In the small intestine, where micelles are only beginning to form, the body absorbs fat-soluble vitamins. Micelles are lipid clusters with both hydrophilic and hydrophobic groups on the inside.
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Data for energy consumption is available for residential, commercial, and industry sectors in Arizona. In 2010, energy consumption consisted of: 27% for residential energy uses; 15% for industry; 24% for commercial; and 34% for transportation.1) Which of the following personal actions could have the greatest impact in reducing greenhouse gas emissions?A) eating organicallyB) driving a hybrid car using ethanolC) increasing home insulationD) recycling aluminum to the nearest industryE) switching to all compact fluorescent bulbs for lighting
driving a hybrid car using ethanol could have the greatest impact in reducing greenhouse gas emissions compare to others
Warming of the globe is caused by greenhouse gases that trap heat. Burning fossil fuels for electricity, heat, and transportation is the main cause of greenhouse gas emissions from human activity. The majority of greenhouse gas emissions come from the transportation sector. Burning fossil fuels for our vehicles, trucks, ships, trains, and airplanes is the main source of transportation-related greenhouse gas emissions. Petroleum-based fuels, which largely consist of gasoline and diesel, account for over 90% of the fuel utilized for transportation.
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Which has a cell wall and no nucleus or membrane bound organelles in which Kingdom should this organism be classified?; Which kingdom have cell wall and a nucleus without a membrane around it?
Answer: Monera (includes Eubacteria and Archeobacteria)Individuals are single-celled, may or may not move, have a cell wall, have no chloroplasts or other organelles, and have no nucleus. Monera are usually very tiny, although one type, namely the blue-green bacteria, look like algae.
Which of the following best explains the increased force of contraction when the rate at which muscle fibers are stimulated by motor neurons increases? A. Decreased activity of SERCA 1A leading to increased intracellular calcium levels, cross-bridge cycling and force generation. B. More frequent opening of the ryanodine receptor leading to increased intracellular calcium levels, cross-bridge cycling and force generation. C. An increase in the number of active motor units resulting in an increase in the force of contraction.
Motor neurons are activated by an increases in the number if active motor units, which causes a rise in the force of the contraction.
What is neuron and its function?The basic building blocks of the nervous system and brain are neurons (also known as neurones or nerve cells). Neurons are the cells that receive sensory information from the outside world, give control signals to our muscles, and transform and relay electrical signals at each stage along the way.
Why are neurons important?Information is transported all through the human body by neurons. They assist in coordinating all of the vital operations of life by using chemical and electrical signals. In the this article, we define neurons and describe how they function.
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in fed-state metabolism an in plasma glucose levels will cause the release of from pancreatic cells.
In fed-state metabolism, an in plasma glucose levels will cause the release of from pancreatic cells is glucagon. Falling glucose levels trigger the pancreas to release glucagon to turn off glycogen synthesis in the liver and stimulate its breakdown into glucose.
Step 1: When plasma glucose levels increase, specialized cells in the pancreas called beta cells will detect the increased glucose levels and release a hormone called insulin.
Step 2: Insulin will then bind to insulin receptors on the cell surface of other cells in the body, such as muscle and fat cells.
Step 3: When insulin binds to the insulin receptors, it triggers a signal cascade inside the cells that causes the cells to take up glucose from the blood stream and store it in the form of glycogen.
Step 4: Glycogen can then be used by the cells for energy when needed.
Step 5: The increased uptake of glucose from the blood stream causes the plasma glucose levels to decrease, which in turn causes the pancreatic beta cells to stop producing insulin.
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unlike the chordates, the other deuterostome phyla of echinoderms and hemichordates are both comprised of____Time Run Attempt
In contrast to the chordates, marine species make up both of the additional deuterostome phyla including echinoderms & hemichordates. Durational Attempt
The conserved region in the genomes of these two worms offers the first evolutionary connection between hemichordates as well as chordates, and as a result, all deuterostomes, providing proof of a shared ancestry between humans as well as their less complicated ancestors. All the other invertebrates are protostomes, with the exception of echinoderms and chordates. Echinoderms are abundant and have calcareous shells, which helps to preserve them as fossils. While chordates only inhabit the water, hemichordates are worm-like aquatic creatures. Hemichordata and Chordata vary primarily in that Hemichordata has an epidermis nervous system while Chordata has a central nerve system.
(Unlike the chordates, the other Deuterostome phyla of Echinoderms and Hemichordates are both comprised of_ Time Run Attempt due 1Hour; 2=
• terrestrial species
• marine species
• tetrapod species
• detritivores)
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the animal in this picture is a/an . group of answer choices blastocoelomate acoelomate pseudocoelomate coelomate
An organism with a body cavity that isn't generated from the mesoderm, like a true coelom, and body cavity, is said to be a pseudocoelomate.
Acoelomates are organisms with really no body cavity at all, pseudocoelomates are organisms having patches of mesoderm on the body cavity, and coelomates are species with a mesoderm-lined body cavity. Pseudocoelomate animals have such a pseudocoelom, which is a bodily cavity filled with fluid and has the literal translation "false cavity." These animals' fluid-filled bodily cavities are lined in part by mesoderm tissue. Organs are not as organized as they would be in a coelomate, despite the fact that they are loosely held in place. Traditional examples of acoelomates are sponges and platyhelminthes. Pseudocoelom is a type of coelom that differs from actual coelomates in that it lacks mesoderm. A fake coelom is another name for it. It is present in Aschelminthes and Nematoda phyla animals. The pseudocoelom is an occupied bodily cavity.
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which of the following methods are used by eukaryotes to control gene expression but are not used by bacteria?
Answer: the answer is a
Explanation:
trust
1 using your definitions from activity 1, identify what type of terrestrial ecosystem you are observing.
The tundra, taigas, temperate deciduous woods, tropical rainforests, grasslands, and deserts are examples of terrestrial ecosystem types.
A terrestrial ecosystem is a population of land-based species and the relationships between biotic and abiotic elements in a specific space. The tundra, taigas, temperate deciduous woods, tropical rainforests, grasslands, and deserts are a few examples of terrestrial ecosystems. A location's temperature range, average annual precipitation, soil type, and amount of light all affect the sort of terrestrial ecosystem that can be found there. Use these materials to pique students' interest in terrestrial ecosystems and show them how various abiotic and biotic factors affect the types of plants and animals that might be found in a given area.
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What do genes contain
DNA constitutes genes. The fundamental physical and functional unit of heredity is a gene.
Genes serve as an example.Many of your characteristics, like your skin tone and hair color, are determined by the genes you inherit. Perhaps Emma's mother carries two genes—one for brown hair and one for red hair—and she gave Emma the red hair gene. Her red hair may be explained by the possibility that her father carries two red hair genes.
A gene is what?
genetic material that is transferred from parent to child. A gene is a short segment of DNA on a chromosome that codes for a specific sequence of amino acids needed to generate a certain protein. Genes are made up of DNA sequences and are ordered sequentially at precise positions on chromosomes in the nucleus of cells.
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Scientists use climate models to predict how Earth’s climate will change over time. While models may use various sources of data, there is one main conclusion that every climate model reaches.
Which of the following describe this conclusion?
Earth’s temperatures will continue to rise if humans continue to release excess greenhouse gases into the atmosphere.
Carbon dioxide levels in the atmosphere will decrease as more fossil fuels are burned.
Sea levels will drop within the next 50 years.
Earth's biodiversity will increase over time as the human population grows.
To comprehend the intricate systems of the globe, scientists utilize climate models.They can test theories and make predictions about past and future climate systems using these models.
How are climate change models used by scientists? In order to comprehend the intricate earth systems, scientists employ climate models.Using these models, they can evaluate theories and reach judgments about past and future climate systems.This will enable them to distinguish between unusual weather phenomena and storms that are caused by climatic changes and those that are merely a product of regular climate variation.Computerized climate models function like a laboratory.They enable researchers to examine how several variables combine to affect a region's climate.To comprehend how our globe is changing, scientists utilize computer programs called climate models.On a number of crucial aspects of our climate, climate models concur.For instance, models consistently predict that increasing the atmospheric concentration of greenhouse gases will raise average temperatures.To learn more about climate change models refer
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which of the following are different between prokaryotic and eukaryotic transcription? select all that apply. A. The area within the cell in which transcription occurs. B. The polymerase used to create RNA. C. The promoter sequences used. D. The processing of RNA. E. The direction of transcription along the DNA molecule.
Correct Option A,C,D The area within the cell in which transcription occurs.The promoter sequences used. The processing of RNA are the difference between prokaryotic and eukaryotic transcription.
Prokaryotic cells lack a true nucleus, moreover, membrane-bound organelles are only present in eukaryotic cells. Another important difference between prokaryotic and eukaryotic cells is that prokaryotic cells are exclusively unicellular, while the same is not true for eukaryotic cells. Eukaryotes reproduce sexually through meiosis, allowing for genetic variation. Prokaryotic cells reproduce asexually by duplicating themselves. RNA polymerase is a high molecular force enzyme. The official name for RNA polymerase is DNA-directed RNA polymerase
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1. a study is being done to test the effects of habitat space on the size of fish populations. different sized aquariums are set up with six goldfish in each one. over a period of six months, the fish are fed the same type and amount of food. the aquariums are equally maintained and cleaned throughout the experiment. the temperature of the water is kept constant. at the end of the experiment, the number of surviving fish are surveyed. What is the independent variable? o The water temperature o The number of fish originally in the tank o The amount of food that the fish receive o The number of surviving fish o The sizes Of the aquariums
The independent variable is the sizes Of the aquariums.
The dependent variable is the number of surviving fish.
An independent variable is a variable that is being manipulated by a scientist. To ensure fair testing, good experiments have only one independent variable. Record the collected data as the scientist changes the independent variable. A brief summary of the experimental content methods results and conclusions.
Independent variables are variables controlled by the experimenter. A dependent variable is a variable that changes according to the independent variable. Two variables can be related by cause and effect. A change in the independent variable affects the dependent variable. It is appropriate to include potential future experiments in the laboratory report.
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which of the following statments is true regarding one of the secretions that contribute to digestion? Pancreatic juice contains enzymes and ions that aid digestion in the small intestine.
Enzymes and ions found in pancreatic juice help the small intestine digest food.
Where can one locate the enzyme?One kind of protein that is present inside a cell is an enzyme. As in body, enzymes catalyze chemical reactions and even have the ability to accelerate such reactions to support life. The body naturally produces enzymes, which are helpful for carrying out crucial processes like muscular growth.
How are enzymes used?Enzymes play a crucial role for reducing a reaction's activation energy, or the amount of energy required for the reaction to start. Enzymes function by attaching to reactant molecules or holding them so that chemical bond-forming and bond-breaking reactions proceed more quickly.
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Describe the difference between the noses of strepsirhines and haplorhines
The facial characteristics, dentition, and placenta of haplorhines, such as monkeys and apes, set them apart from strepsirrhines. Haplorhine is Greek for "simple nose." The faces of haplorhines tend to be flattened and have eyes that are facing forward.
Haplorhine primates must consume vitamin C from their diets, whereas strepsirrhine primates can produce it on their own. When moving quadrupedally through the trees, their non-prehensile tails serve as a balance aid. A big toe, also known as a hallux, does have a nail, allowing them to pierce tree bark, unlike the majority of other monkeys, which have claws instead.
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Suppose you wish to create a large batch of the protein lactase using recombinant DNA. Place the following steps in the order you would have to perform them.
a. Find the clone with the gene for lactase.
b. Insert the plasmids into bacteria and grow the bacteria into clones.
c. Isolate the gene for lactase.
d. Create recombinant plasmids, including one that carries the gene for lactase.
The right order will be: C > B > D > A
Recombinant DNA technology entails changing genetic material outside of an organism to produce living things or their products with improved and desired traits. With the help of the right vector, this approach includes inserting DNA fragments from various sources with desired gene sequences.
In this gene is isolated and inserted into the vector following which recombinants are screened and used for overexpression of protein.
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in motor-skill research, transfer of training is similar to the topic of generalization in animal-learning research. True or False
It is true that in motor-skill research, transfer of training is similar to the topic of generalization in animal-learning research.
Our capacity to transfer knowledge from one environment to another is known as generalization of motor learning. Transfer and interference are terms used to describe generalization, depending on whether it is helpful or harmful.
Transfer is similar to generalization.
Positive transfer of practice from one activity to another helps with related tasks. Practice on one task interferes with learning another one that is comparable.
There is a ton of evidence supporting positive transfer, but less so for negative transfer. Negative outcomes could happen when two tasks call for opposing actions (tap left hand, wriggle right hand, switch hands more forcefully).
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identify the muscular structure that anchors the lens in place. view available hint(s)for part a identify the muscular structure that anchors the lens in place. choroid ciliary body iris suspensory ligaments
A group of fibers known as the lens's suspensory ligament attaches the ciliary body of the eye to the lens and stabilizes it.
What is ciliary body?
A ring-shaped tissue thickening inside the eye called the ciliary body separates the vitreous body from the posterior chamber. It has veins, fibrous connective tissue, and the ciliary muscle. Aqueous humor is secreted into the posterior chamber by ciliary processes, which are folds in the inner ciliary epithelium. The pupil is the next point of entry for the aqueous humor into the anterior chamber.
The lens and ciliary body are connected by zonular fibers, a type of connective tissue. To concentrate light on the retina, the ciliary muscle must be relaxed in order to exert tension on these fibers and alter the shape of the lens.
In order to keep the lens anchored in place, it maintains the lens zonules in addition to producing and reabsorbing aqueous humor.
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Why do you think blood tests are an effective way of measuring our health?
Answer:
Blood tests are an effective way of measuring our health because they can provide important information about various aspects of our health, including our overall health status, nutritional status, and the presence of any diseases or conditions. Blood tests can measure the levels of various substances in our blood, including hormones, enzymes, proteins, and electrolytes, which can provide valuable insights into the functioning of our body's systems and organs. Blood tests can also detect the presence of infections, inflammation, or other abnormal conditions that may require medical attention. Overall, blood tests are a safe, non-invasive, and reliable way of gathering important health information.
Explanation:
The arthropods are the most successful group of animals; several key features explain their success. Select all of the features that one would use to classify members into this phylum.a. growth takes place through ecdysisb. a rigid exoskeleton made of chitinc. closed circulatory systemsd. jointed appendagese. a rigid exoskeleton made of keratinf. segments specialized into functional tagmata
Ecdysis, a stiff exoskeleton comprised of chitin-jointed appendage segments that are specialized into functional tagmata, is the process by which organisms develop.
The arthropods' extraordinary adaptability and success is the reason for their great variety. Arthropods may be found in almost every environment and niche on earth because to the evolution of a wide variety of appendages, including antennae, claws, wing, and mouthparts. On Earth, arthropods are regarded as the most successful animals. More species and individuals are found in this phylum than in all other animal groups combined. Arthropods make up more than 85% of all recorded animal species. All arthropods have specialized appendages, a bilateral symmetry, jointed appendages, segmented body, and an exoskeleton. The following are some of the crucial traits of arthropods: They are exoskeleton-equipped. Their appendages are joined. They have distinct bodily parts.
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Problem Set A 11/07/19 90% Match the following structures used in receptor-mediated endocytosis with their functions. Items (4 items) (Drag and drop into the appropriate area below) Captures the correct cargo molecules Shapes the forming vesicle Mediates contact between the receptor and another component Molecules packaged into vesicle for transport Categories Cargo Receptor Adaptin Clathrin Drag and drop here Drag and drop here Drag and drop here Drag and drop here 18 OF 19 QUESTIONS COMPLETED < 19/19 >
Cargo: molecules packaged into vesicle for transport, Receptor: captures the correct cargo molecule, Adaptin: mediates contact between receptor and another component, Clathrin: shapes the forming vesicle.
What in biology is an endocytosis?Christian deDuve first used the word "endocytosis" in 1963 to refer to both the intake of fluid or macromolecules in tiny vesicles as well as the digestion of big particles (like bacteria).
How do endocytosis and exocytosis differ?Endocytosis is the procedure by which a chemical or particle is taken within the cell by being engulfed by the cell membrane. Exocytosis is the term used to describe the process by which vesicles join the cell membranes and discharge their contents outside the cell.
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Scientists are uncertain whether ____ is an essential mineral for humans.
Select one:
a. iodide
b. silicon
c. magnesium
d. selenium
e. zinc
If silicon is a necessary mineral for humans, scientists are divided on the subject.
Which mineral is required for a healthy contraction of the muscle?Your body needs calcium to convey signals through the neurological system and to assist muscles and blood vessels contract and expand. In addition, calcium aids in the release of hormones and enzymes that have an impact on virtually every bodily process.
Which of the following mineral classifications includes significant minerals?Calcium, phosphorus, magnesium, sulfur, potassium, sodium, and chloride are the main minerals. The trace minerals are required, but in lesser amounts (less than 100 mg each day). Iron, iodine, zinc, fluoride, selenium, copper, chromium, manganese, and molybdenum are a few examples of trace minerals.
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What are the 4 types of contamination?
Physical, biological, chemical, and allergic contamination of food are the four different categories. These categories are described in this blog along with advice on how to stay away from them.
Which three types of pollution are most common?Physical, biological, and chemical pollution are the three categories. But for the sake of this post, we'll focus on four areas. These consist of allergy contamination, microbiological contamination, physical contamination, and chemical contamination.
Which sorts of pollution are the most prevalent?Chemical, microbiological, physical, and allergic pollution are the four primary forms. All food is susceptible to these four types of contamination.
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Rearrange the component of the eye so the first structure that light passes through is listed first and the structure immediately before a signal is sent to the brain is listed last.
Cornea, Pupil, Lens, Retina, Optic Nerve are the component of the eye arrange ia way light enters and sent signal to the brain (outside to inside )
light enters the eye through the cornea. this is the clear, dome-formed surface that covers the front of the eye.
From the cornea, the light passes thru the pupil. The iris, or the coloured a part of your eye, controls the amount of mild passing thru.
From there, it then hits the lens. this is the clear structure inside the eye that focuses light rays onto the retina.
subsequent, light passes through the vitreous humor. that is the clean, jelly-like substance that fills the middle of the eye. It allows to preserve the attention round in form.
subsequently, the mild reaches the retina. this is the mild-sensitive nerve layer that strains the lower back of the eye. here the picture is inverted.
The optic nerve is then responsible for carrying the alerts to the visual cortex of the mind. The visual cortex turns the signals into images (as an example, our vision).
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