The DNA in eukaryotic cells is enclosed in the nucleus, while the DNA in prokaryotic cells is not separated from the rest of the cell's contents.
What do you notice about the ratio of hydrogen to oxygen in each monosaccharides
What lines of evidence lend support to the theory that rna had a central role in the origin of life
The fact that ribosomes are ribosomes—the catalytic site is made of RNA, whereas proteins play a minor structural and auxiliary functional role—supports the RNA world concept. This was supported by the 2001 discovery of the ribosome's three-dimensional structure.
What is RNA ?All living cells contain ribonucleic acid (abbreviated RNA), a nucleic acid with properties comparable to those of DNA. However, RNA is often single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternating phosphate groups and the sugar ribose.
According to this theory, RNA served as a genetic information storage system and a catalyst for chemical reactions in early organisms. DNA didn't become the dominant genetic component until much later in the evolutionary process, and proteins took over as the primary catalyst and structural element of cells.
The RNA World theory would be supported by experimental data demonstrating that a completely self-replicating RNA polymerase ribozyme could be produced in a lab.
Thus, The fact that ribosomes are ribosomes the catalytic site is made of RNA, whereas proteins play a minor structural and auxiliary functional role.
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Why is it important that the phospholipid bilayer be both hydrophobic and hydrophilic?
A) They are not important
B) They maintain balance in the cell
C) To allow cellular bonding
It is important that the phospholipid bilayer is both hydrophobic in the surface and hydrophilic inside to control and manage the incoming organic compounds mainly water from exceeding the needed amount or destablizing the concentration established by the cells.
Hydrophilic is a characteristic of an object which is attracted to water or can synthesize with water. In contrast to hydrophobic like fats, oils and lipis which has a strong aversion and dislike to water molecules.
Transmembrane proteins are found in the plasma membrane. Hydrophilicregions are embedded within the membrane, and Hydrophobic regions project from both surfaces of the bilayer.
Approximately 20-80% of the cell membrane is composed of lipids, the rest, is made up of protein. The lipid layer of the membrane gives it flexible and permeable characteristic. While the protein part assists in transport of molecules it needs to survive.
What molecule is represented by the molecular model shown below?
A} Glucose
B} Adenosine triphosphate (ATP)
C} Adenosine diphosphate (ADP)
D} Starch
Nvm its ATP
Answer:
The correct answer is C) Adenosine Diphosphate (ADP)
Explanation:
DNA is made of four different bases: _______, _______, _______, and ______.
Answer:
Adenine, guanine, cytosine and thymine.
Explanation:
The full form of DNA is deoxyribonucleic acid. It is a double-stranded molecule and each strand of DNA is composed of nitrogenous bases, deoxyribose sugar, and phosphate group.
There are four types of nitrogenous bases that are present in DNA. The four bases are adenine, guanine, thymine, and cytosine. Adenine and guanine comes under purine and thymine and cytosine comes under pyrimidine.
Adenine and thymine makes two hydrogen bond with each, guanine and thymine makes three hydrogen bond with each other.
in which stage of the cell cycle do the nucleus and it’s contents divide
Mitosis brother. also just a tip you can google answers for things like these
The nucleus and its contents divide during the mitotic phase of the cell cycle, which includes the stages of mitosis and cytokinesis.
Explanation:The nucleus and its contents divide during the mitotic phase of the cell cycle. The stage of the cell cycle during which the nucleus and its contents divide is known as the mitotic phase. This phase is divided into two sub-stages. Initially, it involves mitosis, which consists of five stages (prophase, prometaphase, metaphase, anaphase, and telophase) and is responsible for the division of the nucleus. Subsequently, cytokinesis takes place, which refers to the physical separation of the cytoplasmic components into two daughter cells.
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Which of the following statements about enzymes is true?
A. High temperatures can cause enzymes to denature which negatively affects the shape of the active site
B. Extremes in pH can cause enzymes to denature which negatively affects the shape pf the active site
C. Increasing the concentration of a substrate will increase the reaction rate of an enzyme reaction
D. All of the above
E. None of the above
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Imagine an ecosystem with the following populations.
Level of Food Chain Types of Organisms
1.Producers
berry bushes
fruit trees
oak trees
maple trees
2.Primary Consumers
rabbits
mice
squirrels
crickets
ants
grasshoppers
3.Secondary Consumers
foxes
owls
Final answer:
The ecosystem described includes producers like trees and bushes, primary consumers such as rabbits and insects, and secondary consumers including foxes and owls, showcasing the transfer of energy through food chains from the sun to herbivores and carnivores.
Explanation:
Understanding the Ecosystem Food Chain
The ecosystem described involves a hierarchy of organisms from producers to consumers defining their relationships in a food chain. At the base, producers like berry bushes, fruit trees, oak trees, and maple trees capture sunlight to produce energy. These producers are consumed by primary consumers, including rabbits, mice, squirrels, crickets, ants, and grasshoppers, which are herbivores feeding on plants. Moving up the chain, secondary consumers such as foxes and owls, are carnivores that predate on the primary consumers.
In this structured ecosystem, each level of the food chain depends on the organisms below it for energy. Producers harness energy from the sun, primary consumers feed on this generated biomass, and secondary consumers feed on primary consumers. This energy flow demonstrates a basic but crucial ecological concept: the transfer of energy from the sun through various trophic levels up to carnivores.
The described system is a simplified presentation of a complex food web where multiple predators and prey interactions can exist. In the real world, organisms often consume from different trophic levels, making the food web an intricate network of energy transfer contributing to the ecosystem's stability and sustainability.
Ecological succession is typically a _______ process through which a developing ecosystem becomes _______ stable.
Answer:
gradual:more
Explanation:
Answer:
gradual; more
Explanation:
Examples of pure substances are elements and _________.
mixtures
compounds
2.
Iron and aluminum are examples of _____________.
pure substances
compounds
3.
A ____________ is a physical combination of things that can be separated.
mixture
compound
Examples of pure substances are elements and COMPOUNDS
2.Iron and aluminum are examples of PURE SUBSTANCES
3.a MIXTURE is a physical combination of things that can be seperated
The study of chemicals and bonds is called chemistry. There are different types of elements and these are metals and nonmetals.
The correct answer is mentioned below.
What is a mixture?A mixture is a material made up of two or more different chemical substances which are not chemically bonded. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.According to the question, the correct answer is as follows:-
Examples of pure substances are elements and COMPOUNDSIron and aluminum are examples of PURE SUBSTANCESA MIXTURE is a physical combination of things that can be separatedFor more information about the mixture, refer to the link:-
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What best describes psychology as a science?
Psychology is the study of our brain and therefore our actions and behaviour.
Since we study our brain concretely speaking, we are studying humans. And when we study something about the universe, we're studying science.
Hope it helped,
BioTeacher101
You study the mind and what goes on in your mind. Which relates to science because you are studying and stating a hypothesis before and see if you can make things better for said situation.
Carbohydrate: what elements do you expect to find in a carbohydrate?
A carbohydrate would be expected to contain the elements carbon, hydrogen, and oxygen. The ratio is generally 1 Carbon: 2 Hydrogen: 1 Oxygen. Examples are glucose and fructose.
In a carbohydrate, you would expect to find the elements carbon (C), hydrogen (H), and oxygen (O). The word carbohydrate literally means 'hydrated carbon'. The general empirical formula for a carbohydrate is CH2O. This means for every carbon atom, there are two hydrogen atoms and one oxygen atom. Examples include glucose (C6H12O6) and fructose (C6H12O6). Therefore, carbohydrates are composed of these three essential elements.
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Which two generalizations can be made based on what you know about cycles of matter in a closed system?
1 New matter is added, and old matter is destroyed.
2 Matter changes its physical form, allowing it to return to its original state.
3 The amount of matter within the system remains the same.
4 Matter and energy can cross the boundaries of the system.
5 The cycle has a well-defined starting and stopping point.
Answer: The correct answer is option 3) The amount of matter within the system remains the same and 5) The cycle has a well-defined starting and stopping point.
A closed system can be defined as a system in which there is the only exchange of energy with the surrounding, while no exchange of matter takes place.
In a closed system, the cycle has a well-defined starting and stopping point.
Therefore, the two generalizations which can be made for cycles of matter in a closed system are option 1) and 5)
The statements 3 and 5 can be two generalization made by the information of a closed system.
Explanation:A closed system is system in which neither matter nor energy cannot cross the boundaries of the system.So the statement 3 which is the amount of matter remains same in the system is correct one on the bases of the law of conservation of mass.This law states that neither mass and energy can be created nor destroyed but they can change from one form to another form.In the given system, reaction of matter is in cyclic form, the starting and stopping points of reaction can be well defined on the basis of reaction.Which structures are found in plant cells, but not in animal cells? Check all that apply. Cell wall cell membrane chloroplasts lysosomes ribosomes vacuole
The answers would be
Cell Wall
and
Chloroplasts
The structures that are found in plant cells but not in animal cells are:
Cell wall andChloroplastsThe plant cell contains few structures not found in animal cells. The most prominent are:
Cell wall: This gives the plant is definite shape. It is secreted by the cytoplasm and is composed of cellulose. The cell wall is fibrous and has a high tensile strength.Chloroplasts: Since the plants make their own food by photosynthesis, the chlorophyll found in the chloroplasts play a unique role in that process.The lysosomes, ribosomes, vacuole and cell membrane are all found in both plant and animal cells.
Therefore the structures that are found in plant cells but not in animal cells are the cell wall and chloroplasts.
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which of the following best explains why what we know about cells is called a theory and not a law?
The correct answer should be A) Cell theory explains cell behavior where a law would describe it
Theories are used to explain phenomena, while laws just describe what will always happen. Such as the law of thermodynamics that describes what is going on inside a room when heat leaves it.
He is correct!! yuuuuuuup
microbes are also the foundation of what that feeds all life on earth?
The microorganisms are the foundation of all forms of life on Earth, they have prevailed for about 3.5 billion years. The animals, plants, and the modern microbes have all evolved from the primitive bacteria. The life on Earth relies on their activities. According to the human's point of role, one could not survive in the absence of microorganisms.
The microbes demonstrate numerous benefits like the production of oxygen, nitrogen fixation, degradation of substances (like sewage, wastewater, and cellulose). Microbes play vital roles in the biosphere, the economic uses of microbes take place in the field of agriculture, industry, bioremediation, and medical microbiology.
Microorganism are also the foundation of Food chains that feed all life on earth.
Explanation:A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or in a colony of cells. Microorganisms facilitates plants in fixing nitrogen.The convert waste organic compounds to carbon, oxygen and nitrogen for use by plants.Hence plant are primary source of food for almost all animals on earth.They are also indirectly providing food to some animals.Mycorrhiza from a relationship between fungi and which part of vascular plants
The roots.
Hope this helps!
-Payshence
Which type of protein penetrates tot he interior of the plasma membrane but does not extend all the way through it
The answer is Integral. :) Hope this helps!
What special property must the dna have to establish binding between the sliding clamp and dna?
Carbon dioxide is not considered an organic molecule.Photosynthetic organisms turn it into an organic molecule in the form of a
From approximately 240 to 66 million years ago, dinosaurs dominated most of the land habitats on Earth. Around 66 million years ago, most dinosaurs went extinct when an asteroid struck the Earth. Mammals, which were much smaller and lived primarily in underground habitats, were able to avoid extinction. Mammals then underwent an adaptive radiation to develop a wide variety of new species. Which statement best explains why the adaptive radiation of mammals was possible?
A.
New species were able to form because the change in environmental conditions increased the mutation rate of mammals.
B.
Populations of mammals were able to rapidly increase since the Earth had a single, large habitat after the asteroid hit.
C.
Mammals were able to diversify to make use of the variety of habitats that were previously occupied by dinosaurs.
D.
The loss of predation decreased the rate at which mammals became reproductively isolated from one another.
The correct answer is option C, that is, mammals were able to diversify to make use of the variety of habitats that were previously occupied by dinosaurs.
Adaptive radiation refers to the comparatively fast evolution of various species from a single common ancestor. Adaptive radiation usually takes place when a species enters a novel area and distinct traits influence its existence. An illustration of adaptive radiation is the progression of mammals after the annihilation of dinosaurs.
Answer:
C for you, A for PLATO/Edmentum user.
What controls all the other glands? thyroid gland pancreas pituitary gland endorphins
Answer:
Pituitary Gland
Explanation:
The pituitary gland is the crucial gland of endocrine system and is located in the lower side of brain just behind the nose. This gland secrete hormones directly into the blood. The hormones secreted by pituitary affects the reproductive organ, adrenal gland and more specifically thyroid gland.
The gland regulate endocrine secretions by pancreas. The endorphins are certain chemicals helps in the reduction of pain.
Why do scientists publish the details of important experiments?
Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.
Living organisms all have dna and rna which are botha. Carbohydratesb. Lipidsc. Proteinsd. Nucleic acids
What structures on the ventral side of the planaria propel it forward?
Cilia are the structures on the ventral side of the planaria that propel it forward.
Planaria is a type of flatworm that belongs to the class Turbellaria. Some species of planaria are terrestrial, while some are aquatic. Planarians have a soft and ciliated body. Cilia are hair like organelles situated on the ventral dermis of the planarians. Cilia function for locomotion by propelling the planarians forward, and allowing them to move smoothly on a layer of mucus.
The equator is a line of latitude true or flase
why do the cells lining the stomach divide more quickly than those in the liver A. they are much smaller cells B. they have fewer chromosomes C. they need much more surface area D. they undergo more wear and tear
The answer is
D. they undergo more wear and tear.
The cells lining the stomach divide more quickly than the liver cells because they undergo more wear and tear.
Mitosis:
It is the process by which cells divide to form two daughter cells. They are identical to the parent cells.
This is often replace the older cells or lost (die) due to any kind of stress.Cell lining of the stomach encounter the acid and other stress, result in death of a lot of cell.So, Cell lining of the stomach divide to replace the lost cells.Therefore, the cells lining the stomach divide more quickly than the liver cells because they undergo more wear and tear.
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What are two factors does carrying capacity compare?
Answer: D : Population size and time
Explanation: answer on E2020, hope this helps!
N the 1600s, which scientist discovered microbes in pond water by using a microscope? Theodor schwann robert hooke anton van leeuwenhoek matthias schleiden
Answer:
Anton Von Leeuwenhoek in 1674, observed a drop of pond water under a microscope. He observed living microbes like bacteria and protozoa. He is commonly known as ''the Father of Microbiology" and he is the first microscopists and microbiologists.
Anton van Leeuwenhoek was a scientist who discovered microbes in pond water by using a microscope.
Who was Anton van Leeuwenhoek?Anton van Leeuwenhoek is generally recognized as the father of microbiology. Both protists and bacteria were discovered by him. He was not only the first to view this hitherto unseen world of "animalcules," but he was also the first to contemplate looking—certainly, the first with the capacity to see.
He most likely first noticed bacteria in 1674, followed by protozoa a few years later. He was able to separate those "very little animalcules" from a variety of sources, including human mouth and intestine, pond, and well water.
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During respiration, a seed metabolizes sugars. what is the source of the sugar metabolized by the seed?
The source of the sugar metabolized by the seed is photosynthesis.
The procedure used by plants to transform light energy into a chemical form of energy is known as photosynthesis. The chemical energy can afterward be discharged to fuel the plants to perform their activities.
During photosynthesis, carbon dioxide and water can be combined in the existence of chlorophyll and sunlight to generate oxygen and glucose (carbohydrates). However, the prime component generated in the procedure is glucose (sugar) that is the molecule, which generates energy to mediate the activities of the cell.
The source of sugar metabolized by the seed during respiration is the stored carbohydrates in seeds and bulbs, which are converted into simple sugars like sucrose. Once the seed starts growing, the plant can produce its own food through photosynthesis.
Explanation:The source of the sugar metabolized by the seed during respiration is the carbohydrates stored in seeds and bulbs. These carbohydrates, such as starch, are converted into simple sugars like sucrose through metabolic processes. Once the seed starts germinating and new shoots and leaves grow, the plant can produce its own food through photosynthesis.
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