which type of cell never has a cell wall?

Answer:

Abiotic and biotic factors make up an ecosystem. Abiotic factors are the non-living parts of an environment. These include things such as sunlight, temperature, wind, water, soil and naturally occurring events such as storms, fires and volcanic eruptions. Biotic factors are the living parts of an environment, such as plants, animals and micro-organisms.

Together, they are the biological factors that determine a species' success. Each of these factors impacts others, and a mix of both is necessary for an ecosystem to survive.

Answer:

A

Explanation:

Carbohydrates give the body energy to go about your day’s mental and physical tasks. Digesting or metabolizing carbohydrates breaks foods down into sugars, which are also called saccharides. These molecules begin digesting in the mouth and continue through the body to be used for anything from normal cell functioning to cell growth and repair

Both simple and complex carbohydrates break down into glucose (aka blood sugar). A simple carb is one that’s comprised of one or two sugar molecules, while a complex carb contains three or more sugar molecules.

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The explanation generally given for the lethality of monosomic individuals is that monosomy may unmask recessive lethals that are tolerated in heterozygotes carrying the wild-type allele. Option C is the correct answer.

Monosomy refers to the condition where an individual has only one copy of a particular chromosome instead of the usual two. In some cases, the loss of a single chromosome is not immediately lethal, especially if the chromosome carries non-essential genes. However, monosomy can unmask recessive lethal alleles that are usually tolerated in heterozygotes with two copies of the chromosome. When there is only one copy of the chromosome, the absence of the wild-type allele can lead to the expression of the recessive lethal allele, resulting in lethality.

Therefore, the explanation generally given for the lethality of monosomic individuals is that monosomy may unmask recessive lethals that are tolerated in heterozygotes carrying the wild-type allele (Option C).

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Answer:

Independent is what youre testing so it should be eating vegetables and fruits. and Dependent is what your outcome should be the dependent variable depends on you IV (independent variables) so the DV should be whether you run faster or not.

Explanation:

Prednisone cannot be classified as a carbohydrate. Similarly, it cannot be classified as a lipid or a residue of a protein.

Carbohydrates are organic compounds composed of carbon, hydrogen, and oxygen. They are a primary source of energy for the body and play essential roles in various biological processes. Examples of carbohydrates include sugars, starches, and cellulose. Prednisone, on the other hand, is a synthetic corticosteroid medication used to treat inflammation, allergies, and immune system disorders. It belongs to the class of drugs known as glucocorticoids and is primarily derived from a steroid backbone.

Lipids, on the other hand, are a broad class of biomolecules that include fats, oils, waxes, and sterols. They are characterized by their insolubility in water and their role in storing energy, providing insulation, and forming cell membranes. Prednisone, being a synthetic corticosteroid, does not possess the characteristic structure or properties of lipids.

Furthermore, proteins are complex macromolecules composed of amino acids and are involved in various biological functions such as structural support, enzymatic activity, and cellular signaling. Protein residues refer to the remaining components of a protein after certain modifications or cleavage. Prednisone does not contain the characteristic structure or properties of protein residues.

In conclusion, prednisone is not classified as a carbohydrate, lipid, or residue of a protein due to its distinct chemical composition and properties. Its classification as a synthetic corticosteroid places it in a different category altogether.

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An increase in blood pressure can result from fibrous deposits, lipid deposits, plaque, and blockages in major arteries.

Coronary artery disease is brought on by plaque buildup in the arteries that supply blood to the heart. Plaque is created by cholesterol encrustations. The inside of the arteries gradually becomes more constricted due to plaque formation.

A younger age can be the result of artery hardening brought on by high blood cholesterol levels. Many people's elevated cholesterol levels are brought on by diets that are overly rich in trans and saturated fats. Diabetes is another risk that may contribute to artery hardening.

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Carbon from glucose is essential for the formation of amino acids the process which is responsible for the production of glucose in plants is photosynthesis.

Photosynthesis is the process by which plants or other organisms transforms light energy into chemical energy. During the process of photosynthesis, plants need three basic things to live: water, sunlight and carbon dioxide.

Photosynthesis is the process by which a plant produces its food using energy from sunlight, carbon dioxide from the air and water from the soil. The word photosynthesis can be separated to make two smaller words: ‘photo’ which means light ‘synthesis’ which means putting together

In this process, light energy from the Sun is absorbed by the green substance, called chlorophyll, present in leaves. This energy allows the production of glucose (food) by the reaction between carbon dioxide and water. Oxygen is also produced as a by-product.

Carbon dioxide + Water  → Glucose + Oxygen

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Answer:

Plant, it has a rectangluar, box shape and is green.

Explanation:

The answer for the first blank is “one”.

The answer for the second blank is “dominant”.

The answer for the third blank is “gain” of function.

Proto-oncogenes need or demand only "one" allele (gene copy or variant) to be altered in order to cause cancer (changes in the deoxyribonucleic acid or DNA). One allele is all that is required for a proto-oncogene to develop into an oncogene that causes cancer. Since only one allele (or gene copy) is required to create an oncogene that induces cellular transformation and resulting in cancer, it is referred to as a "dominant" mutation. This type of mutation causes a "gain" in function since the affected cells can now divide uncontrollably and serve a new purpose.

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The nutrition in the second one is the healthiest choice as it is having less calories and less saturated fat.

The biochemical and physiological process by which an organism uses food to sustain its life is referred to as nutrition. Ingestion, absorption, assimilation, biosynthesis, catabolism, and excretion are all part of the process.

Nutritional science is the study of the physiological process of nutrition.

Nutrition should have everything in a certain amount. As in the given list, granola has the least amount of saturated fats, less sugar, as well as less calories.

Thus, the best healthiest choice will be granola.

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Answer:

D

Explanation:

A virus, because it requires a host cell to reproduce

Answer:

C

Explanation:

ATP has to do with energy so the correct answer would be energy storage.

The one that describes ATP is energy storage. The correct option is C.

A chemical that is a part of all living cells and gives energy to a variety of metabolic processes, including the production of RNA.

In patients with advanced solid tumors, the effects of laboratory-produced ATP on weight loss and muscle strength are being investigated. Likewise known as adenosine triphosphate.

The principal energy source for critical biological processes such muscular contraction, nerve impulse transmission, and protein synthesis is ATP generated in mitochondria.

For example, large levels of ATP signal that the cell has enough ATP and does not need to produce any more through cellular respiration. In this instance, a product "feeds back" to block its pathway, which is a form of feedback inhibition.

Thus, the correct option is C.

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The true statements regarding the hole in the ozone layer are:

a. The Montreal Protocol is the agreement to reduce the use of CFCs.

b. The hole in the ozone layer is located over Antarctica in the southern hemisphere.

c. The hole in the ozone layer is caused by chlorofluorocarbons (CFCs) emitted by some industrial practices.

The false statements are:

d. The Kyoto Protocol is the agreement to reduce the use of CFCs. (The Kyoto Protocol primarily focused on reducing greenhouse gas emissions, not specifically targeting CFCs.)

e. The hole in the ozone layer is located over eastern Europe in the northern hemisphere.

f. The hole in the ozone layer is caused by CO₂ and other greenhouse gases. (The hole in the ozone layer is primarily attributed to CFCs and not greenhouse gases like CO₂.)

The Montreal Protocol is indeed an international agreement aimed at reducing the use of substances known as chlorofluorocarbons (CFCs). CFCs are industrial chemicals that were commonly used in various applications such as aerosol propellants, refrigerants, and foam-blowing agents. These chemicals were found to be major contributors to the depletion of the ozone layer.

The hole in the ozone layer refers to a region of significantly depleted ozone concentrations in the Earth's stratosphere. This hole is primarily located over Antarctica in the southern hemisphere. The depletion of the ozone layer is attributed to the release of CFCs into the atmosphere. Once released, these CFCs rise to the stratosphere where they are broken down by ultraviolet (UV) radiation, releasing chlorine atoms. These chlorine atoms catalytically destroy ozone molecules, leading to the formation of the ozone hole.

On the other hand, the Kyoto Protocol, although an important international environmental agreement, primarily focused on reducing greenhouse gas emissions to mitigate climate change. It did not specifically target CFCs or the ozone layer depletion.

Therefore, the true statements are that the Montreal Protocol aims to reduce the use of CFCs and that the hole in the ozone layer is caused by CFC emissions from industrial practices, particularly in the southern hemisphere over Antarctica.

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Answer:

Oxygen

Explanation:

The answer is Oxygen because the plants take in carbon dioxide and give out oxygen and oxygen is used by humans by cellular respiration

Oxygen is a waste product of photosynthesis that organisms require for cellular respiration. Therefore, the correct option is C.

Light-dependent activities in plants and other photosynthetic organisms result in the release of oxygen, a waste product of photosynthesis, into the environment. This oxygen is essential for cellular respiration because it helps organisms generate ATP, a source of energy. As the final electron acceptor in the electron transport chain during cellular respiration, oxygen assists in the oxidative phosphorylation process that produces ATP.

Therefore, the correct option is C.

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Your question is incomplete, most probably the complete question is:

Which of the following is a waste product of photosynthesis that organisms need for cellular respiration.

Phosphorus is introduced into the ecosystem in the form of inorganic fertilizers or by detergents.

The biogeochemical cycles refers to the cycles in nature that involves the movement of materials such as nutrients.

Phosphorus is introduced into the ecosystem in the form of inorganic fertilizers or by detergents. These are taken up by plants and some may go off into the lakes by run off water.

When materials that contain phosphorus is burnt in air, some of the phosphorus may become oxidized as ash.

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Answer:

Phosphorus cycles between living things and the soil.Plants absorb phosphates from the soil and turn them into organic compounds through assimilation.Animals eat plants and pass the phosphorus through the food chain from one animal to the other.An animal dies and decomposes, returning the phosphorus to the soil.

Explanation:

HIV protease is an example of an aspartyl protease, which is an enzyme that utilizes an aspartate side chain during the catalytic cleavage of a peptide bond.

As a relatively small homodimer of a 99-residue protein, it can be directly synthesized or cloned and expressed in fast-growing cells, which has made it a target for structure-based drug design to treat HIV infection.

HIV protease is an enzyme that is produced by the HIV virus. It is essential for the maturation of the virus, as it cleaves the viral polyproteins at specific sites. As a result, HIV protease is an attractive target for drugs that aim to prevent HIV replication. Structure-based drug design involves the use of structural information about a protein to design drugs that bind to it and inhibit its activity.

This approach was applied to HIV protease in order to identify compounds that could bind to the enzyme and block its activity. By doing so, it was hoped that these drugs could prevent the maturation of the virus and thus reduce the spread of HIV infection.

In conclusion, HIV protease is an example of an aspartyl protease that is targeted for structure-based drug design to treat HIV infection. Its relatively small size and ability to be synthesized or cloned and expressed in fast-growing cells make it an attractive target for drug discovery.

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Answer:

Naturally occurring events can disrupt the cycling of essential building blocks such as carbon, nitrogen, and oxygen in a number of ways. For example, floods, fires, and other natural disasters can cause the release of large amounts of these elements into the atmosphere or into bodies of water, where they can be carried away and not returned to the original ecosystem. Additionally, changes in climate can cause changes in the availability of certain elements, leading to disruptions in the cycling of these elements. Finally, changes in land use can cause soil erosion, which can also disrupt the cycling of essential building blocks.

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Events such as wildfires, volcanic eruptions, and climate change can disrupt the cycles of carbon, nitrogen, and oxygen. Wildfires release carbon into the atmosphere, volcanic eruptions can alter the nitrogen cycle, and climate change affects the balance of gases, including oxygen.

Naturally occurring events, such as wildfires, volcanic eruptions, and climate change, can disrupt the cycling of essential building blocks. For example, wildfires release a large amount of carbon into the atmosphere, disrupting the carbon cycle. Volcanic eruptions can release nitrogen and sulfur compounds which can alter the nitrogen cycle. Similarly, climate change, caused due to anthropogenic activities, can change the balance of gases in the atmosphere, thereby affecting the oxygen cycle.

Take a forest ecosystem for instance. In a normal scenario, the forest acts as a carbon sink, absorbing carbon dioxide from the atmosphere and storing it in the form of biomass. However, in the event of a wildfire, the same forest can turn into a carbon source, releasing stored carbon back into the atmosphere.

Volcanic eruptions, by releasing nitrogen and sulfur-based compounds, can result in acid rain. This acid rain can alter soil composition, affecting its ability to cycle and fix nitrogen thereby impacting plant growth and health. Besides, climate change induced by the increase in greenhouse gases can disrupt the balance of oxygen in the seawater affecting marine life's oxygen intake, disrupting the oxygen cycle subtly.

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Answer:

i) In terms of food production in plants, water is essential to plants as it is the evaporation of water that occurs in leaves that allows carbon dioxide to enter and to begin photosynthesis.

(ii) In terms of the shape of the plant, water is important to plants as the hydration of the cells of a plant allows the cell walls to retain their shape and thus give structure to the plant.

(iii) In terms of hydrolysis and dehydration, water is essential for plants because water is not a photosynthesis reactant or respiratory product.

Explanation:

i) Water is important in terms of making food in plants:

Water is required for the germination of seeds and as soon as growth starts water serves as a carrier in the distribution of mineral nutrients and plant food.

ii) Water is important in terms of the plant's shape:

Responsible for turgor pressure in cells (Like air in an inflated balloon, water is responsible for the fullness and firmness of plant tissue. Turgor is needed to maintain cell shape and ensure cell growth.)

iii) Water is important in terms of hydrolysis and dehydration:

During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen.

The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas.

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Answer:

there are 196.9 million mi²

Answer:

Enzymes

Explanation:

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A protein catalyst is called a(n) Enzymes

Answer:

DNA

Explanation:

The statement that does not characterize proteins is: they appear to be the molecular carriers of coded hereditary information. Therefore option A is correct.

While proteins play various essential roles in the body, including structural and functional roles, they are not the primary carriers of coded hereditary information.

Instead, DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are the molecules responsible for carrying and transmitting genetic information.

Proteins are involved in the expression and execution of genetic information, but they do not serve as carriers of the genetic code.

Proteins are highly diverse molecules made up of amino acids, and their function depends on their specific three-dimensional shape, which can be influenced by factors such as heat or acidity, leading to denaturation or coagulation.

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Answer:

(c) unicellular eukaryotic

Explanation:

Firstly, all prokaryotic cells are unicellular, they cannot be multicellular, so be cannot be correct.

Both Chlamydomonas and Paramoecium are single-celled organisms, so must be unicellular prokaryotic (a) or unicellular eukaryotic (c).

Chlamydomonas and Paramoecium are eukaryotic. They have membrane-bound organelles like a nucleus and food vacuoles. They are examples of protists.

"UACUUUACGAAAGCGCCC and Tyr The Thr Lys Ala Pro" sequence of bases and amino acids could be produced by transcription and translation of the dna molecule shown.

Amino acids are chemicals that make proteins when they combine. The building blocks of life are amino acids and proteins. Amino acids are left over after proteins are digested or broken down. The human body requires amino acids to produce proteins, which aid in digestion. The sequence of bases and amino acids "UACUUUACGAAAGCGCCC and Tyr The Thr Lys Ala Pro" might be created by transcription and translation of the dna molecule depicted. Amino acids are needed for the creation of body protein as well as other nitrogen-containing molecules including creatine, peptide hormones, and certain neurotransmitters. Although allowances are given in terms of protein, amino acids are the biological need.

Here,

The sequence of bases and amino acids "UACUUUACGAAAGCGCCC and Tyr The Thr Lys Ala Pro" might be created by transcription and translation of the dna molecule depicted.

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Answer:

The marble

Explanation:

That the smaller the object is the stronger it falls the more damage it makes or the deeper it falls

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Answer:

D

Variation existed in the traits of the fox population. Foxes with smaller ears and noses were able to stay warmer and were more likely to survive and reproduce to pass their genes on to offspring. Over time, the fox population showed a shift to smaller ears and noses.

_______________________________

Answer:

~Shoto todoroki here~

The Bergeret d'Abois proved,The behavior of spiders on human remains.

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Answer:

The behaviour of spiders on human remains

Explanation:

Complete question:

A local ecosystem includes a variety of grasses that grow in spongy soil. In spring, heavy rainfall and melted snow cover the soil in a few inches of water. The ecosystem Drives By late summer. What term best describes this ecosystem?

a. Pond

b. Estuary

c. wetland

d. Streambed

Answer:

The ecosystem is a Wetland. Option C

Explanation:  

Wetlands are zones where water is the principal factor that models the environment, vegetables, and animals. This environment is permanently or temporarily water-saturated. The species richness and productivity lever are characteristics of these ecosystems, hosting many aquatic and terrestrial animals and plants. Soils are in anaerobic conditions the whole time, but plants can grow on these grounds with no oxygen. Many factors might influence the wetland creating the typical hydrological conditions of the ecosystem. These factors are the rainfall, water entrance to the area, type of soil, ground elevation differences, and water evaporation.

Among others, wetlands are one of the most productive ecosystems, which provide many economical and social benefits through water, fishes species, crustaceans, woods, fibers, medicinal plants, and wildlife. Wetlands are a source of sweet water, they prevent the entrance of seawater, retain sediments, remove toxins.

These environments are fragile and seem to be at risk of deterioration and degradation.