A student is examining an onion cell under a microscope. Based on their observations, the student proposes that the onion cell is in interphase.

Because of its appeal, the cheetah has contributed to the success of numerous conservation initiatives. Due to this, the cheetah is most appropriately categorized as a flagship species.

Threatened species are ones that are being highlighted. As a result, they act as an ambassador to spread the word about how important it is to protect them. The Bengal Tiger, Asian, African, and Giant Panda are a handful of the World Wildlife Fund's signature species. A flagship species serves as the symbol of an environmental habitat, movement, campaign, or concern. They can be mascots for entire ecologies. Identification of a flagship species requires taking into account a species' social, cultural, and economic value. The environmental harm occurring in the area where these animals inhabit is demonstrated by the fact that they are typically among the most threatened or endangered species.These animals are typically among the most threatened or endangered species, which demonstrates the environmental harm occurring in the area where they live.

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Answer:

balance, D, reduction, mass and distance

Explanation: it will balance in that dierection, the stronger team would pull more overthowing the other team, resiestance = friction, everything needs mass for gravity

The Physical activity guideline recommends that adults get at least 150 minutes of moderate physical activity.

Moderate-intensity activities are those that get you moving fast enough or strenuously enough to burn off three to six times as much energy per minute as you do when you are sitting quietly, or exercises that clock in at 3 to 6 METs. The Physical Activity Guidelines for Americans recommend that adults get at least 150 minutes of moderate-intensity aerobic physical activity or 75 minutes of vigorous-intensity physical activity, or an equivalent combination each week. For Even Greater Health Benefits. If you go beyond 150 minutes a week of moderate-intensity training, 75 minutes a week of vigorous-intensity activity, or an equivalent combination, you'll gain even more health benefits.

So we can conclude that adults get at least 150 minutes of moderate-intensity aerobic physical activity according to CDC.

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The overall quality of the river is good as pH is in normal range.

The pH scale determines how basic or acidic aqueous or other liquid solutions are. The expression translates the hydrogen ion concentration, which normally ranges between 1 and 1014 gram-equivalents per litre, into numbers between 0 and 14. It is frequently used in chemistry, biology, and agronomy. Pure water, which has a pH of 7, contains 107 gram-equivalents of hydrogen ions per liter, making it neutral (neither acidic nor alkaline). Acidic solutions are those with a pH below 7, and basic, or alkaline, solutions are those with a pH above 7.

Because all the levels are within the typical range, the river's general quality is good. Healthy water should have dissolved oxygen levels between 5 and 8 mg/L, phosphorus levels between 0.005 and 0.05 mg/L, levels of nitrate at or below 10 mg/L, and a biotic index below 3.75. The data shows that all of these values fall within the normal range, so we can say that the quality of the water is good.

Consequently, the river's overall quality is good.

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If a student discovers the natural pollinator of a plant while working with a flowering plant in which nectar is deeply placed in the flowers, it is most likely to have a long proboscis.

What is a proboscis?

A proboscis is simply a long appendage coming out of an animal's head, and is used to describe the nose or snout of a vertebrate, like an elephant, or the mouth of an insect, like a butterfly. In insects, the proboscis is an elongated, tubular structure that is used for sucking food into the body

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Answer:

Deoxyribonucleic acid (abbreviated DNA) is the molecule that carries genetic information for the development and functioning of an organism. DNA is made of two linked strands that wind around each other to resemble a twisted ladder

Explanation:

The Horizon of Mollisol soils that exist under prairies were created by prairie plant roots. Mollisols frequently have a surface horizon that is 2 to 3 feet deep and contains large amounts of organic materials.

Mollisols have high inherent fertility due to the surface horizon's depth and abundance of organic materials. The roots of prairie plants are very deep. developed prairies can retain in their soil more than 10 tonnes of roots per acre, with some roots reaching depths of more than 8 feet and most of the roots developing as a dense mat in the top foot of soil. The Mollisol soils found under prairie plants were created by the root systems of those plants. Mollisols frequently have a surface horizon that is 2 to 3 feet deep and contains large amounts of organic materials. Mollisols have high inherent fertility due to the surface horizon's depth and abundance of organic materials. The terrain is excellent for conversion to agriculture due to the high fertility of the soils created by tallgrass grasslands.

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Integral proteins are those that have a substantial amount of attachment to the plasma membrane. Through hydrophobic contact, they are kept inside the membrane. transmembrane that are integral

Since they make up a membrane both physically and functionally, integral  proteins are given that name. Integral protein structurally pierces the hydrophobic portions of the phospholipid bilayer.

A protein domain that spans a membrane is known as a transmembrane domain (TMD). The topological conformation that TMDs typically take is that of an alpha helix, while some TMDs, such those found in porins, can adopt a different shape. Although proteins like membrane pumps and ion channels can contain polar amino acid residues, they are less common in transmembrane  since the lipid bilayer's core is hydrophobic.

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The integration center analyzes the painful sensation.

What is reflex action?

A reflex is an unintentional, unplanned sequence or action and a virtually immediate movement that occurs in reaction to stimuli. Reflexes can also be referred to as reflex actions. Neural circuits that are capable of acting on an impulse before that impulse reaches the brain are referred to as reflex arcs, and they are what make a reflex possible.

A reflex loop's integration center is located exactly in the middle of the loop. This part of the spinal cord is the location where information gathered by sensory neurons is passed on to the neurons that control the muscles. Afferent neurons are the neurons that travel from the brain to the spinal cord.

Hence, reflex action and integration center both are responsible for the analysis of painful sensations.

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The newest layers are on top and the oldest layers are at the bottom. This observation indicates that the fossils of plankton outdate the fish.

Any surviving remains, impression, or evidence of a once-living thing from a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe imprints in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces. Organisms that formerly lived and whose shapes and forms may still be recognized are called fossils.

The existence of marine life in rocks suggests that there was once an ocean in the region where the rocks were deposited. High mountains occasionally include marine life fossils, indicating that rocks generated on the bottom were uplifted. The movement of the Earth's plates has slowed and ceased. Over time, plate movement has caused continents to form and fragment.

The newest layers are on top and the oldest layers are at the bottom. As sediments can include once-living animals, sedimentary rocks frequently contain a large number of fossils.

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To reach the plant, the fungus produces spores, which are transported by wind, water, or animals, such as insects.

In both sexual and asexual reproduction as shown above, fungi produce many small, light-weight spores that disperse from the parent organism by either floating on the wind .

Fungi reproduce by spreading microscopic spores. These spores are often present in the air and soil, where they can be inhaled or come into contact with the surfaces of the body, primarily the skin.

Various enzymes produced by fungi are used industrially and in detergents. Fungi are also used as biological pesticides to control weeds, plant diseases and insect pests.

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Answer:

D. Traits for smaller animals with short horns will be selected.

Explanation:

The process of natural selection will favour those individuals that possess the combination of characteristics that are most likely to survive and reproduce. As the hunters tend to target the larger animals with big horn, smaller animals with short horns will have better chances of survival so the traits for short animals with short horns will be selected.

Since the mutation shows dominant inheritance, the probaility of inheritance is 0.5 or 50%.

The information missing is about the penetrance of the mutant allele. The information in the text gives that the mutation shows 60% penetrance. With this penetrance, the probability of inheritance is 0.5 x 0.6 = 0.3 or 30%.

What are alleles?

At a certain genomic region, an allele is one of two or more variations of the DNA sequence (a single base or a segment of nucleotides). For each genomic region with such variation, an individual inherits two alleles, one from each parent. The person is homozygous for the allele if the two alleles are the same.

Hence, the probably of inheritance is 0.5 or 50%

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c) algal species take the place of the dead coral, and the fish community is dominated by herbivores following best describes the consequences of white-band disease in caribbean coral reefs .

In comparison to temperate or polar populations, tropical communities are often older. In comparison to a tundra community, the growth season in the tropics lasts nearly five times as long. Thus, biological time moves five times more quickly in the tropics.

The increased metabolic rates, ecological dynamics, and coevolutionary processes brought on by the higher temperatures in the tropics produce and sustain more biodiversity.

Invasive non-native species and habitat degradation were the biggest threats to island biodiversity. Islands contain larger populations of extinct and severely endangered species than continents, as well as human languages.

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Answer: D

Explanation:

An instance of a chemical change: d. A plant converts carbon dioxide into carbohydrates.

Chemical change arises when a substance combines with every other to form a new substance, known as chemical synthesis or, as an alternative, chemical decomposition into extra distinctive substances. those tactics are called chemical reactions and, in widespread, are not reversible except by using similar chemical reactions.

The five conditions of chemical exchange: are coloration exchange, formation of a precipitate, formation of a fuel, smell trade, and temperature trade. A chemical exchange happens when one chemical substance is transformed into one or more one-of-a-kind materials, such as when iron will become rust. Chemical adjustments occur through the method of chemical reactions, and the ensuing materials have different residences because their atoms and molecules are organized otherwise.

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There are three bypass reactions in gluconeogenesis, out of them the one reaction which does not show reciprocal regulation is Pyruvate carboxylase and PEP carboxykinase bypass pyruvate kinase reaction.

The three bypass reactions where the energy transfer of ATP→ADP takes place are:

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Answer:

electric vehicles aka less use of petroleum and less greenhouse gas

Population density is defined as the quantity of people in a given space or volume, and it is critical to the survival of a population. In nature, there are various constraints on population number and expansion. Some are depending on the density, whereas others are not.

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The structure of the cell membrane support its function because it has phospholipids which have ends that are attracted to water and ends that repel water that allows only certain molecules to enter and leave.

This is referred to an organelle which contain double layers of lipids and protein which creates a selectively permeable barrier in the cells of most living organisms.

It functions by separating and protecting the interior of cells from the outside environment which contain pathogens and other unwanted substances.

The phospholipids have ends that are attracted to water and ends that repel water which ensures that movement of particles in and out of the cell are regulated and is therefore the reason why option D was chosen as the correct choice.

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The Periodic Table element that is being represented is totally determined by the number of protons in the nucleus, although this is not a comprehensive identification. The amount of neutrons in the nucleus provides us with the necessary information to determine which isotope of that element is being represented. Different isotopes may exist for an element.

What is atom?

An atom is the tiniest piece of ordinary matter that makes up a chemical element. Atoms that are neutral or ionised make up every solid, liquid, gas, and form of plasma. Atoms are incredibly tiny, measuring typically 100 picometers across.

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Answer:

The main role of chloroplast is to conduct photosynthesis

Explanation:

Chloroplasts are specialised organelles characterised by their high concentration of chlorophyll. They convert light energy into chemical energy by photosynthesis.

Chloroplast carry out a number of other functions including fatty acid synthesis, some amino acid synthesis and the immune response in plants.

Chloroplasts along with the nucleus, cell membrane, and endoplasmic reticulum participate in the plant immune response.

They make all of the cell's purine and pyrimdines.

They also convert nitrite into ammonia, which supplies the plant with nitrogen.

Chloroplasts are highly dynamic, they circulate and are moved around within plant cells and occasionally pinch into two to reproduce.

Answer: Chloroplast is known as coloured pigments. They are the ones

               that give colours to flowers, fruits and leaves. Chlorophyll is

               present in the leaves. expand it a bit more mark me as brainlist ig

The primary function of the thymus gland is to train special white blood cells called T-lymphocytes or T-cells.

The immune system of the body includes white blood cells. They support the body's defenses against illness and infection. Granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes are different types of white blood cells (T cells and B cells).

T-lymphocytes, often known as T-cells, are specialized white blood cells that are trained by the thymus gland. Our bone marrow sends lymphocytes (white blood cells) to your thymus. In our thymus, the lymphocytes develop into specific T-cells. The T-cells develop before they are released into our bloodstream. They move to our lymph nodes, which are collections of cells, and other lymphatic system organs, where they aid in the immune system's defense against illness and infection.

Thus from the above conclusion we can that the primary function of the thymus gland is to train special white blood cells called T-lymphocytes or T-cells.

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Answer:

B. in the nucleus

Explanation:

Proteins synthesized on free ribosomes either remain in the cytosol or are transported to the nucleus, mitochondria, chloroplasts, or peroxisomes. The initial sorting of proteins to the ER takes place while translation is in progress. In contrast, proteins synthesized on membrane-bound ribosomes are translocated into the ER while their translation is in progress. They may be either retained within the ER or transported to the Golgi apparatus and, from there, to lysosomes, the plasma membrane, or the cell exterior via secretory vesicles. (if this helps any)

True, As energy travels through an ecosystem, some of it is lost at each trophic level because it is lost to heat due to the activity of each organism.

As organisms need energy for metabolic operations like keeping warm and digesting food, all biological groups experience energy loss in the form of heat (up to 80–90 percent).

Unused energy eventually escapes as heat in an environment. When one organism eats another organism, energy and nutrients are transmitted through the food chain. Decomposers eat up any energy that a deceased organism may have had.

As energy travels through an ecosystem, it gets less concentrated at each trophic level. A trophic level's energy transfer rate can be as low as 10%, with the majority of the remaining energy being wasted as heat during metabolic activities.

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The main dietary component in the growth of dental decay caries is free sugars. When oral bacteria break down glucose to create acid, which demineralizes the hard structures of the teeth, dental caries is created (enamel and dentine).

As part of its metabolism, the anaerobic bacteria S. mutans is known to create lactic acid. Second, S. mutans can adhere to tooth surfaces when there is sucrose present because it produces glucans, a polymer that helps to attach the bacteria to the tooth. Dental decay is caused by acids produced by bacteria that digest sucrose and other dietary carbohydrates, which dissolve tooth mineral, chiefly hydroxyapatite, Ca10 (P04)6(0H)2. These microorganisms are found in dental decay plaque, a buildup of bacteria on the tooth's surface.

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If Telomerase stopped functioning then it Limits the growth of the cells.

Telomerase shortening limits the growth the cells by doing Senescence in the cells or by crisis in the cells with the inactivated checkpoints.

Drugs that inhibits telomerase activity  or kill telomerase producing cells may potentially stopped and kill the cancer cells in the tracks.

Since cell division occurs throughout the lifetime telomerase get shorter and shorter as we age and thus its number in the cell decreases as Telomerase helps in the Chromosome rearrangements leading to the cancer.

Thus when the Telomerase stopped functioning then the cell becomes inactive or dies which leads to major disease such as cancer.

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