Oxytocin is a hormone produced by neurons located in the supraoptic nucleus of the hypothalamus, a region of the brain that plays a crucial role in regulating a variety of physiological and behavioral processes.
Once produced, oxytocin is released into the bloodstream via the posterior pituitary gland, a small structure located at the base of the brain. From there, oxytocin travels to various parts of the body and exerts its effects by binding to specific receptors in target tissues, such as the uterus and mammary glands.
Oxytocin is involved in a range of physiological processes, including labor and delivery, lactation, social bonding, and stress regulation.
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Which amino acid has an r-group that forms a covalent bond with the polypeptide backbone, thereby restricting the flexibility of the polypeptide?
Nonpolar amino acids are typically found inside of proteins.You may already be aware that a series of smaller molecules known as amino acids combine to produce proteins, which are macromolecules.
Only roughly twenty different types of amino acids are used by the majority of organisms, including humans. The placement of these amino acids in this protein can affect how they behave in the body and whether they are polar or nonpolar.
Nonpolar amino acids are found inside proteins, whereas polar or charged amino acids are found on the surface of proteins. This is a characteristic of all proteins. Protein stability is greatly influenced by hydrophobicity, and the nonpolar effect on protein folding is thought to play a substantial part in this process.
Peptide bonds are used to connect two or more amino acids, and eventually these bonds combine to create polypeptides. These peptide bonds need water and are covalent in nature. a carboxyl group and an amino group to create. Long-chain amino acids are created by hydrolysis of these components.
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Though they are classified in many ways, almost all classifications designate an emotion as either ______ or ______
Though different classification systems exist, many of them categorize emotions as either positive or negative.
Positive emotions are typically associated with pleasurable experiences, such as happiness, contentment, and excitement. Negative emotions, on the other hand, are often associated with unpleasant experiences, such as fear, anger, and sadness. It's important to note that while positive and negative emotions are often discussed as opposite ends of a spectrum, they are not necessarily mutually exclusive. It is possible to experience a mixture of positive and negative emotions in response to a given situation, and the intensity and duration of these emotions can vary widely from person to person.
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why is it logical to observe that wind-pollinated species usually grow in dense stands containing many individuals of the same species? why is it logical to observe that wind-pollinated species usually grow in dense stands containing many individuals of the same species? this increases genetic diversity in a population. wind-pollinated species maximize the chance that the pollen will be blown away from the individual. wind-pollinated species become able to withstand strong wind, which increases their fitness. wind-pollinated species maximize the chance that the wind will carry pollen from one individual to another.
The correct answer is "wind-pollinated species maximize the chance that the wind will carry pollen from one individual to another."
It is logical to observe that wind-pollinated species usually grow in dense stands containing many individuals of the same species because it maximizes the chance that the wind will carry pollen from one individual to another. Wind is an unpredictable and diffuse pollination agent compared to animals such as bees, which are more targeted in their pollination activity. Therefore, wind-pollinated species must produce large quantities of pollen to increase the chances of successful pollination. Growing in dense stands with many individuals of the same species increases the likelihood that pollen from one individual will reach another, which is necessary for successful fertilization. This strategy is also an adaptation to reduce the waste of valuable resources by preventing the dispersion of pollen into areas where it has a lower chance of successfully pollinating other individuals.
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What is the largest eukaryotic cell?
Answer:
The largest eukaryotic cell can be a neuron that can be as long as 100 centimeters.
I hope this helps... :)
when maxwell realized he forgot to study for his psyc 102 exam, he became nervous and his heart rate increased. this is due, in part, to the activation of his blank 1 nervous system.
Increases sympathetic nervous system activity (fight - flight response) of his nervous system.
The sympathetic nervous system's primary actions include expanding blood vessels, raising blood pressure, contracting muscles, releasing sweat from sweat glands, widening bronchi to allow for greater oxygen exchange, and contracting the heart, all of which aid in the body's preparation for emergency situations. EXAMPLES. The sympathetic nervous system causes physiological changes such as increased heart rate, expansion of bronchial passageways, decreased large intestine motility, dilation of pupils, and perspiration. The paraventricular nucleus is the primary hypothalamic region for the central regulation of the autonomic nervous system, which is controlled by the hypothalamus.
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What happens when hair cells are bent away from kinocilium?
A mechanical reaction happens inside hair cells when they are bent away from the kinocilium.
The "hair cell receptor potential" is the name given to this reaction. This potential is produced by the stereocilia's bending, which results in a change in the hair cell's membrane potential. Ion channels open as a result of the change in membrane potential, enabling positively charged ions to enter and negatively charged ions to exit.
The membrane potential shifts from being more positive with the entry of positively charged ions to being more negative with the outflow of negatively charged ions.
The transduction cascade is triggered by this alteration in membrane potential, and it eventually results in the release of neurotransmitters from the hair cell.
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amylose chains contain more sites for enzyme action than do amylopectin chains. this means that amylose-containing starchy foods raise blood sugar more quickly than do amylopectin-containing starchy foods. (true or false)
False. The statement is actually the opposite of what is true. Amylopectin, a branched form of starch, contains more sites for enzyme action than amylose, a linear form of starch.
The branching allows more sites for enzymes to break down the starch into glucose molecules.
When starchy foods are consumed, the starch is broken down into glucose, which enters the bloodstream and raises blood sugar levels. Foods with a higher glycemic index (GI) raise blood sugar levels more quickly than those with a lower GI.
Since amylopectin-containing starchy foods have more enzyme action sites, they are more readily broken down into glucose and have a higher GI than amylose-containing starchy foods. Amylose-containing starchy foods are broken down more slowly, resulting in a slower and more sustained release of glucose into the bloodstream and a lower GI. Therefore, the statement "amylose-containing starchy foods raise blood sugar more quickly than do amylopectin-containing starchy foods" is false.
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Does oxygenated blood contain a high percentage of carbon dioxide?
No, oxygenated blood does not contain a high percentage of carbon dioxide.
What is oxygenated blood?Oxygenated blood is blood that has been enriched with oxygen in the lungs. It is bright red in color and carries oxygen from the lungs to the rest of the body. When we breathe in, oxygen from the air enters our lungs and diffuses across the walls of the air sacs into the surrounding capillaries. Oxygen binds to hemoglobin in red blood cells, forming oxyhemoglobin. The oxygenated blood then leaves the lungs through the pulmonary veins and travels to the left side of the heart, which pumps it out to the body's tissues and organs.
In contrast, deoxygenated blood is blood that has already delivered its oxygen to the body's tissues and is returning to the heart and lungs to be re-oxygenated. Deoxygenated blood is darker in color and can appear bluish or purplish when seen through the skin. It is carried by the veins, which ultimately lead back to the right side of the heart, where it is pumped to the lungs for re-oxygenation.
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(1) What is the reasoning why basic dyes stain the bacterial cells?(2) Immersion oil is used on the bright-field microscope to observe bacterial cells. What objective can only be used with the immersion oil?
(1) Basic dyes, such as crystal violet and methylene blue, stain
bacterial cells due to their positive charge. (2) Immersion oil is used with the high-power (100x) objective lens on a bright-field microscope to observe bacterial cells.
(1) Basic dyes, such as crystal violet and methylene blue, stain bacterial cells due to their positive charge. Bacterial cells have a negatively charged surface, which attracts the positively charged basic dye molecules. As a result, the dye molecules are absorbed by the bacterial cells and become trapped inside the cell wall. The basic dye molecules also tend to be larger and more complex than acidic dyes, which allows them to bind more strongly to the bacterial cells. This leads to a more intense staining of the bacterial cells, making them easier to visualize under a microscope.
(2) Immersion oil is used with the high-power (100x) objective lens on a bright-field microscope to observe bacterial cells. This is because the high-power objective lens has a very short working distance and a high numerical aperture, which provides a higher resolution image of the specimen. However, the short working distance means that the objective lens must be brought very close to the specimen, which can cause refraction and loss of light. Immersion oil is used to eliminate the air gap between the objective lens and the specimen, reducing refraction and increasing the amount of light that enters the lens. This results in a clearer and more detailed image of the bacterial cells. Without immersion oil, the image produced by the high-power objective would be too blurry and distorted to be useful.
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which element is considered the most versatile element in living organisms and why?hydrogen, because it provides most of the mass of human bodieshydrogen, because it can be found in both organic and inorganic moleculescarbon, because it can bond with many elements to form complex moleculescarbon, because it provides strength to the important protein, keratin
The most versatile element in living organisms is Carbon, because it can bond with many elements to form complex molecules.
Carbon is called a versatile element because it can create four covalent bonds, Carbon can bond with any element or atoms to form a compound by forming a single, double or triple bond.Carbon has 4 electrons in its outermost shell (L-shell) due to its electronic configuration 2,4.To reach the noble gas configuration to become stable, Carbon has to donate or accept four electrons from other elements. But it is not possible because of its small size.To counterattack, this problem Carbon forms a covalent bond by sharing its four electrons.
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if a diploid individual is heterozygous at exactly 7 loci, how many unique gamete genotypes can they make?
If a diploid person possesses heterozygosity at precisely 7 loci, this individual can produce 128 unique gamete genotypes.
If a diploid individual is heterozygous at 7 loci, this means that they have two different alleles at each of these 7 locations on their chromosomes. When this individual produces gametes (sperm or eggs) for reproduction, they will randomly select one of the two alleles at each of these 7 loci to pass on to their offspring.
The number of unique gamete genotypes that this individual can produce can be calculated by using the formula [tex]2^{n}[/tex], where n is the number of heterozygous loci. In this case, n = 7, so the calculation is:
[tex]2^{7}[/tex] = 128. Therefore, this individual can produce 128 unique gamete genotypes.
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which of the following statements is/are true about centralization and cephalization? a. all animals exhibiting cephalization exhibit centralization b. all animals exhibiting centralization exhibit cephalization c. a
The statement "d. None of the above" is true regarding centralization and cephalization.
In animal anatomy and evolution, centralization and cephalization are related but distinct concepts. The concentration of the nervous system into a central nervous system (CNS) composed of the brain and spinal cord is referred to as centralization. This enables quick and coordinated responses to stimuli. A decentralised nervous system, on the other hand, is distributed throughout the body and lacks a distinct CNS.
Cephalization, on the other hand, refers to the development of a distinct head region with sensory and feeding appendages. Cephalization is frequently associated with centralization because the development of a brain and sensory organs in the head region allows for more efficient sensory processing and movement coordination.
While centralization and cephalization are frequently found in animals, they are not always associated. Some animals, such as jellyfish, have a centralised nervous system but no distinct head region, whereas others have a distinct head region but no centralised nervous system (e.g., flatworms).
As a result, neither statement (a) nor statement (b) is entirely correct, and the correct response is (d) None of the above.
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thiobacillus ferrooxidans is a type of bacteria that oxidizes iron compounds for energy and then uses that energy to build carbohydrates. we might best recognize this bacterium as the rust-colored ring that builds up inside toilet bowls. thiobacillus ferrooxidans is an example of a
Thiobacillus ferrooxidans is an example of a chemoheterotroph. Robert Starkey of the American university Rutgers isolated it from a field in the 1930s.
A genus of Gram-negative betaproteobacteria is known as Thiobacillus. The type strain of the genus Thiobacillus thioparus is known as the StarkeyT strain. More than 30 "species" have been identified in this genus since it was founded by Martinus Beijerinck in 1904, with the original strain most likely being what is now known as Halothiobacillus neapolitanus (the first strain was observed by the biological oceanographer Alexander Nathansohn in 1902). However, the vast majority of these names were never formally or profitably published.
The complete question is:
Thiobacillus ferrooxidans is a type of bacteria that oxidizes iron compounds for energy and then uses that energy to build carbohydrates. We might best recognize this bacterium as the rust-colored ring that builds up inside toilet bowls. Thiobacillus ferrooxidans is an example of a
a) photoautotroph
b) chemoheterotroph
c) photoheterotroph
d) chemoautotroph
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the collection of microorganisms that live on or on a human host in a mutually beneficial way is called the human ______.
The term "human Microbiome" refers to a group of microorganisms that cooperatively coexist on or in a human host.
What are the names of the microorganisms that exist on or in the human body?Abstract. Millions of minuscule living things, collectively referred to as the human microbiota, live inside the human body. Microbes known as bacteria are most commonly found in the gut, nose, and mouth.
What exactly is a microbiome?There are around 30 trillion human cells in every human body, but our microbiome is made up of an estimated 39 trillion microbial cells, including bacteria, viruses, and fungus that live on and inside of us.
The genes that these cells carry make up the human microbiome, which is made up of the 10-100 trillion symbiotic microbial cells that each individual harbours, predominantly bacteria in the gut.
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What is composed mainly of broad-leaves deciduous trees-trees that drop their leaves in the autumn?
Answer:
This means that they lose all their leaves in the autumn, remaining bare through the cold winter months until the spring, when they grow new foliage. Some broadleaf trees however, are evergreen, rather than deciduous
There are two types of vascular tissue within plants. where water and minerals are transported from the roots to the rest of the plant in ? while sugars are transported from one part of the plant to another in?.
The two types of vascular tissue in plants are xylem and phloem. Xylem is responsible for transporting water and minerals from the roots to the rest of the plant
while phloem is responsible for transporting sugars and other organic molecules from one part of the plant to another.
Xylem is composed of specialized cells called tracheary elements, which include both tracheids and vessel elements. These cells are dead at maturity and have walls that are reinforced with a lignin polymer, allowing them to withstand the pressure generated by the movement of water through the plant. Water is transported from the roots to the rest of the plant through a process known as transpiration, which involves the evaporation of water from the leaves.
In contrast, phloem is composed of living cells called sieve elements, which are connected end-to-end to form a long, continuous tube. Phloem also contains companion cells, which provide metabolic support to the sieve elements. Sugars and other organic molecules are transported through the phloem in response to the needs of the plant, with the direction of flow typically being from areas of high concentration (source) to areas of low concentration (sink).
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Cartilage repairs slowly after adolescence becauseA. chondrocytes no longer are able to divide.
B. mechanical stress
C. parathyroid hormone.
D. wrist bones
Answer: A
Explanation:
what statement provides the best explanation for the change in the species between rock layer 1 and rock layer 2? a. the original species hybridized with a single new species, resulting in a variety of species. b. an abrupt change in the environment caused the original species to evolve into several new species. c. humans introduced several new species into the environment after the original species had died out. d. the original species died out, and several new species evolved that were better suited to the environment.
The best explanation for the change in the species between rock layer 1 and rock layer 2 is that the original species died out, and several new species evolved that were better suited to the environment.
This is known as natural selection and is a key component of the theory of evolution. Natural selection is the process by which organisms better adapted to their environment tend to survive and reproduce more successfully than less-adapted organisms. This is why the species changed between rock layer 1 and rock layer 2 – the original species died out, and new species evolved that were better suited to the environment. This process of natural selection allows species to adapt to their environment, which can result in major changes to the species over time.
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what is the correct sequence of these events, from earliest to most recent, in the evolution of life on earth? 1. origin of mitochondria 2. origin of multicellular eukaryotes 3. origin of chloroplasts 4. origin of cyanobacteria
From the earliest to the most recent events in the evolution of life on Earth, 4, 3, 1, 2, 5 is the correct order.
1) Origin of mitochondria
2) Origin of multicellular eukaryotes
3) Origin of chloroplasts
4) Origin of cyanobacteria
5) Origin of fungal/plant symbioses
In the development of the early Earth and the biosphere, cyanobacteria were crucial. Since the Great Oxidation Event much earlier, they have been in charge of oxygenating the atmosphere and oceans. Along with being the forerunners of the chloroplast, they were also important primary producers in both ancient and modern oceans. The typical morphological criteria, however, are not always accurate for microfossil interpretation, therefore the identification of cyanobacteria in the early fossil record is still unclear.Some eukaryotic lineages contain primary chloroplasts, which are cell organelles that are specifically designed for photosynthesis. It is thought of that they
Fungal/Plant symbiosis's beginning
The appearance of this mutualism between 400 and 460 million years ago, when the earliest plants began to colonise the land, is suggested by fossil evidence and DNA sequence research.
. A host plant's root system is colonised by fungi, which boost the plant's ability to absorb water and nutrients while giving the fungus access to the plant's carbohydrates produced during photosynthesis.
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What is the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?
origin of mitochondria
origin of multicellular eukaryotes
origin of chloroplasts
origin of cyanobacteria
origin of fungal/plant symbioses
why is proline often found at places in proteins that are not alpha-helical?
Proline, unlike the other amino acids, has a constant angles around its C(alpha)-N bond, proline is frequently found at locations in proteins that are neither alpha-helical. Beta-turns work nicely with proline.
Which four kinds of proteins are there?Protein structure is divided into four levels: primary, middle, tertiary, and quaternary. Understanding the nature and function of each degree of something like a protein's structure is important for fully understanding how a protein works. Through Tracy Kovach.
What foods have a lot of protein?Plant-based foods (fruits, vegetable, grains, nuts, and seeds) frequently lack one or more necessary amino acids, but animal-based foods (meat, chicken, fish, eggs, and dairy products) are frequently good sources of complete protein.
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small rna-containing particles for the synthesis of proteins
Protein synthesis is carried out by tiny RNA-containing particles called ribosomes.
What are ribosomes?The biological components known as ribosomes are in charge of protein synthesis. They consist of two subunits, a big and a small subunit, each of which is made up of proteins and ribosomal RNA (rRNA). Through a process known as translation, the ribosomes read the genetic code contained in messenger RNA (mRNA) molecules and use this knowledge to build amino acids into proteins. All living cells, including bacteria, archaea, and eukaryotes, include ribosomes. In eukaryotic cells, ribosomes are either free in the cytoplasm or attached to the endoplasmic reticulum, depending on whether the synthesized protein is destined for use within the cell or for secretion outside the cell.
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true or false. carbohydrates can play a structural role in animal cells.
It is TRUE that carbohydrates can play a structural role in animal cells.
One of the four most significant macromolecules in living things and a biological molecule, carbohydrates. Like most biological molecules, carbohydrates are made up of organic compounds. They therefore have both carbon and hydrogen in them. Oxygen is a third element that is present in carbohydrates. Simple sugar molecules called saccharides make up carbohydrates. A monosaccharide is hence a single monomer of carbohydrates.
All plants and animals require carbohydrates because they give us the much-needed energy, primarily in the form of glucose, that we need to survive.
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most cells and cellular structures are: group of answer choices microscopic medical specialties quadrants body systems.
When cells are in their normal condition, interior features can be seen using a phase-contrast microscope.
High contrast and high-quality images of living cells in their natural condition can be seen using this microscope. As we check the choices The entire cell as well as sub-cellular components and compartments within it can be viewed using an electron microscope. Images of fluorescing samples are captured using a fluorescence microscope. Using a compound light microscope, the user can view a magnified image by allowing visible light to travel through the specimen (the biological sample you are examining) and be bent by the lens system. By boosting the light contrast between the various densities of the sample component, the phase-contrast microscope allows us to see living cells and organelles. Therefore, the correct response is a phase contrast microscope.
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two cells are compared. cell a has 10 mitochondria. cell b has 1 mitochondria. what will cell a likely be better able to do?
Cell A would most likely deliver more energy as compared to cell B. This is because it has more mitochondria which are known as the powerhouse of the cell.
What are Mitochondria?Mitochondria may be characterized as a type of double membrane-bound cell organelle that is found in the cytoplasm. They make most of the energy for the cell and have their own genetic material that is different from the genetic material found in the nucleus.
Mitochondria multiply when the energy needs of a cell increase. Therefore, power-hungry cells have more mitochondria than cells with lower energy needs. For example, repeatedly stimulating a muscle cell will spur the production of more mitochondria in that cell, to keep up with energy demand.
Therefore, cell A would most likely deliver more energy as compared to cell B. This is because it has more mitochondria which are known as the powerhouse of the cell.
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Mrs. Smith's class designed and performed an experiment to test the effects of UV-B radiation on salamander egg hatching success. They placed salamander eggs in the Sun underneath either a UV-B blocking or UV-B transmitting filter. They then determined the number of eggs that hatched in each treatment. The results of their experiment are shown in the graph.
What was the effect of UV-B blocking on hatching success?
A.
There was no effect on hatching success when UV-B was blocked.
B.
Hatching success decreased when UV-B was blocked.
C.
Hatching success increased when UV-B was blocked.
D.
Hatching success increased when UV-B was transmitted.
why do yeast use enzymes when a disaccharide is used as a feed stack
Yeast use enzymes when a disaccharide is used as a feedstock because the disaccharide needs to be broken down into monosaccharides, such as glucose and fructose, before it can be used as a nutrient source.
What is monosaccharides?Monosaccharides are the simplest form of carbohydrates, composed of a single sugar molecule. They are also known as simple sugars and include glucose, fructose, and galactose. Monosaccharides are the building blocks of more complex carbohydrates, such as disaccharides and polysaccharides. Monosaccharides can be used by the body for energy, or they can be converted into more complex sugars and stored for later use.
Enzymes are proteins produced by the yeast that catalyze the breakdown of the disaccharide into its component monosaccharides. These monosaccharides are then metabolized by the yeast and used to produce energy and synthesize macromolecules, among other things.
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Which of the following best describes the scientific method, in the order of steps? o Make a guess, compute the consequences of the guess, ask a question, make an observation o Conduct an experiment, make a guess, make an observation, ask a question o Ask a question, conduct an experiment, make a guess, compute the consequences of the guess o Ask a question, make a guess, compute the consequences of the guess, conduct an experiment Ask a question, make an observation, compute the consequences of a guess, make a guess
Biology and other sciences are built on the scientific method, a strategy for addressing problems. They nevertheless use the same underlying process to provide rational, fact-based solutions.
There are five essential steps in the scientific method plus a feedback step:
Identify a finding.Ask a question.Construct a theory or a plausible explanation.Make a forecast based on the theory.Validate the prediction.Iterate: Based on the results, form new hypotheses or forecasts.
The scientific method is used in all fields, including physics, geology, chemistry, and psychology. Researchers from numerous fields have put forward a number of tests and questions.
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mitochondria and lysosomes carry out specific functions for the cell and are collectively called
Mitochondria and lysosomes carry out specific functions for the cell and are collectively called Organelles.
Inside cells, organelles are specialized structures that carry out a variety of tasks. Literally, the phrase refers to "tiny organs." Organelles provide specialized duties to keep a cell alive, just like organs like the heart, liver, stomach, and kidneys serve specific roles to keep an individual alive.
The mitochondrion, a large organelle also present in eukaryotic cells, is in charge of producing ATP, a substance used by living things as a source of energy. Many cells have hundreds of mitochondria.
These mitochondria feature an inner membrane that folds over several times to form a multi-layered structure known as cristae and an exterior membrane that encloses the organelle. The matrix, a substance that contains proteins and mitochondrial DNA, is the fluid that fills the mitochondria.
Other organelles like lysosomes are responsible for digesting and recycling toxic substances and waste. They are embedded with proteins called enzymes, which break down macromolecules, including amino acids, carbohydrates, and phospholipids.
Lysosomes are produced by a larger organelle called the Golgi complex, which manufactures other cellular machinery as well. Whenever a cell dies, it self-destructs using its own lysosomes.
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how many unpaired electrons does an atom of carbon have in its ground state?
Carbon has two unpaired electrons in its ground state.
The electron configuration of an element is the way electrons are arranged in its atomic orbitals. By knowing the electron configuration of an element, we can predict and explain the chemistry of an element.
Electrons which are filled with inner orbitals are closer to the nucleus and more tightly bound to it, and therefore they are rarely involved in chemical reactions.
The chemistry of an atom depends mostly on the electrons in its valence shell or outermost shell and those which have the highest n-value are called the valence electrons.
By Hund’s rule, the electron configuration of carbon is 1s2 2s2 2p2. Therefore the ground state of the neutral carbon atom has two unpaired electrons.
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how does the process of fertilization take place in flowers?
Answer:
The process of fertilization in plants takes place when the male gamete from the pollen grain combines with the female gamete from the ovule to form a zygote, which further develops into an embryo. Pollen grains containing the male gametes are transferred from the anther of the flower to the stigma of the same or another flower through a process called pollination. The pollen grain then releases the male gametes, which travel through a tube-like structure called the pollen tube, down to the ovary. Once the sperm cells reach the ovule, they fertilize the egg cell in it to form a zygote. The zygote goes through a few divisions to form the embryo.
Explanation:
