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Explanation:

Answer:

control which substances enter the cell

Explanation:

According to this question, scientists in year 1800s studied how fat-soluble substances and water-soluble substances interact with cell membranes. Cell membrane is a cellular structure found in every living cell whose function is to demarcate the interior of the cell from the external environment.

Based on the study, cell membrane interacts with water-soluble and fat-soluble substances in order to control which substances can enter the cell. The cell membrane is selectively permeable meaning that not all substances passes through it into and out of the cell.

Answer:

the answer is A.groups of biomesmake up a community, andand groups of populations make up a biome.

All the ova in a woman's ovaries have the exact genetic sequence because they are all derived from the same original cell in her body, which underwent the process of meiosis.

When talking about all the ova (egg cells) in an individual female, which is true about them?Ova, or eggs, are the female gametes (reproductive cells) of most animals and some plants.

An ovum contains one copy of the chromosomes of the mother, including mitochondrial DNA, and is fertilized by a sperm cell, which contains a corresponding complement from the father to form a zygote.

The following statement is true about all the ova (egg cells) in an individual female:They have half the number of chromosomes as her body cells, and the exact same genetic sequence as each other.

This assertion is based on the idea of meiosis, which is the cellular division of gametes that occurs in the ovaries. Meiosis I and II result in four haploid daughter cells, each with half the original number of chromosomes.

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The organisms that feed on dead and decaying matter are called Saprotrophs.

An organism that feeds on dead and decaying organic matter is called a saprotroph. These organisms are heterotrophic, which means that they obtain their food from other sources. They are important in the ecosystem because they break down dead organic matter and recycle it back into the soil, making nutrients available to other living organisms

Answer:

A. Saprotrophs

Explanation:

Saprotrophs are organisms that obtain their nutrients by feeding on dead and decaying matter. They play a crucial role in the ecosystem by decomposing organic material and recycling nutrients back into the environment.

These organisms secrete enzymes that break down complex organic compounds into simpler substances, such as sugars and amino acids, which they can absorb and utilize for their own growth and energy needs. Examples of saprotrophs include fungi (such as mushrooms and molds) and certain bacteria.

Unlike autotrophs, which can produce their own food through photosynthesis or chemosynthesis, saprotrophs rely on external sources of organic matter for their nutrition. They actively decompose dead plants, animals, and other organic materials, aiding in the process of nutrient recycling and decomposition.

Heterotrophs, on the other hand, are a broader category of organisms that obtain their nutrients by consuming other living or dead organisms. This includes saprotrophs, as well as other types of organisms such as herbivores, carnivores, and omnivores.

Parasites, meanwhile, are organisms that live in or on other organisms, known as hosts, and obtain their nutrients from the host while causing harm or damage to it. Unlike saprotrophs, parasites typically rely on a living host for their sustenance rather than feeding on dead and decaying matter.

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Fever, neck pain/stiffness, and photophobia are common symptoms. Headache, dizziness, disorientation, and delirium are meningitis that can manifest differently depending on the host's age.

The infection and inflammation of the fluid and membranes around the brain and spinal cord are known as meningitis. These membranes are known as meninges. Meningitis inflammation often causes symptoms such as headache, fever, and stiff neck.

Hospital tests, A physical examination to seek for signs of meningitis. A blood test to detect germs or viruses. A lumbar puncture is a procedure in which a sample of fluid from the spine is removed and tested for germs or viruses. a CT scan to look for any brain issues, such as oedema.

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Answer:

The correct answer would be - high intercellular ratio the ratio of NAD/NADH and low intercellular ratio the ratio of [NADP+]/[NADPH]

Explanation:

The role of NAD/NADH in dehydrogenation reactions and NADPH/NADP  in reductions explains that to promote or increase the oxidation of substrates the ration of NAD+/NADH should be high:

malate + NAD+ <===-> OAA +NADH + H+.

As NADPH and NADP+ generally help to increase the reduction of substrates, so we expect the ratio of [NADP+]/[NADPH] to low.

The given strand "CCCAGATAA" is DNA. A DNA strand is a long chain or sequence of nucleotides.

Nucleotides are the building blocks of DNA and consist of a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). In a DNA strand, the nucleotides are linked together through covalent bonds between the sugar and phosphate groups, forming a sugar-phosphate backbone.

The specific sequence of nitrogenous bases in a DNA strand carries the genetic information. Adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G) through hydrogen bonding, forming the famous double helix structure of DNA.

Therefore, the strand "CCCAGATAA" is DNA.

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Cats have evolved certain behaviors that are influenced by their natural instincts and experiences.

When a cat sees milk, it may be attracted to it because it contains nutrients that are important for its survival, and the cat may associate the presence of milk with positive experiences. This can include nursing from its mother as a kitten or catching and consuming prey that contains milk or milk products.

On the other hand, when a cat sees a stick, it may perceive it as a threat or danger, and may associate it with negative experiences, such as being hit or attacked by a predator. This can trigger the cat's natural instinct to flee or hide from potential danger, as a survival mechanism.

Overall, a cat's behavior is influenced by its instincts, past experiences, and environmental cues. It may approach things that it perceives as positive or beneficial, and avoid or flee from things that it perceives as dangerous or threatening.

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Answer:

Oxygen and hydrogen ions are also formed from the splitting of water. To replace the electron in the reaction center, a molecule of water is split. This splitting releases an electron and results in the formation of oxygen (O2) and hydrogen ions (H+) in the thylakoid space.

Respiration is a process where many chemical bonds inside the body break and release energy. This energy is used to perform various activities such as moving muscles. The energy transformation in this process option A.Chemical energy from broken bonds is transformed into mechanical energy for muscles.

Respiration is a complex metabolic process that occurs within living cells and involves the breakdown of glucose and other molecules to produce ATP. ATP is the primary energy currency of the cell, and it is used to power various cellular processes, including muscle contraction.

During respiration, the chemical bonds between the atoms in glucose and other molecules are broken down through a series of enzymatic reactions. These reactions release energy in the form of ATP. ATP is a high-energy molecule that can be used to fuel a variety of cellular processes, including muscle movement.

The energy transformation that occurs during respiration involves the conversion of chemical energy into mechanical energy. The chemical energy stored in the bonds of glucose and other molecules is released during the breakdown process and is used to generate ATP.

In summary, respiration involves the breakdown of chemical bonds in glucose and other molecules to produce ATP, which is used to power various cellular processes, including muscle contraction. The energy transformation that occurs during respiration involves the conversion of chemical energy into mechanical energy. The correct answer is option A.

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Answer:

Fretiliaztion

Explanation:

In the given experiment, the dependent variable would be the growth rate of the plant.

In this case, the independent variable is the different concentration of the fertilizer. The researcher is deliberately varying the concentration levels to observe its effect on the plant's growth. The dependent variable, which is the growth rate of the plant, is expected to be influenced by the different concentrations of the fertilizer.

By measuring and comparing the growth rate of the plant across the different fertilizer concentrations, the researcher can determine if there is a relationship between the concentration of the fertilizer and the plant's growth. This helps to assess the impact of the fertilizer on the plant's development and identify the optimal concentration that promotes the highest growth rate.

The dependent variable is crucial in analyzing the results and drawing conclusions about the effectiveness of the fertilizer at different concentrations.

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Answer:A and D

Explanation:

It’s the USA test prep question

The following data indicate that the statement "the medium rabbit leg is stable and evolution is unlikely to happen" is false. Hence, options A and D are the correct options for the statements.

Natural selection selects organisms that are best suited to their environment, and these individuals multiply to increase their population size. In this case, generation after generation, the population of short-legged rabbits decreased from 23 to 13. This indicates that the small-legged rabbits were eaten by the predators, resulting in a reduction in their number. The number of middle-legged rabbits did not vary much, so they did not gain a selective advantage, but long-legged rabbits easily escaped from predators, and as a result, they rapidly increased in number, and as a result, the small-legged population declined with the increase in long-legged rabbits.

Hence, the medium leg is stable and evolution is unlikely" is false. Hence, options A and D are the correct options for the statements.

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The question is incomplete, the complete question is the below,

Number with short legs (Generation 1 to 6) =23, 22, 20, 18, 15, 13

Number with medium legs (Generation 1 to 6) =97, 98, 95, 97, 96, 97

Number with long legs (Generation 1 to 6) =135, 155, 160, 163, 175, 180

A)The rabbits with medium length legs are the most stable and thus will out survive the others.  

B) Medium length legs appears to be neither an advantage or disadvantage in the current environment.

C) The rabbits with longer legs have a selective advantage that allows them to survive and reproduce.

D) It is unlikely that evolution is occurring because none of the traits have

disappeared from the population.

E) A predator is the likely source of natural selection in this population as the rabbits with longer legs are more likely to escape compared with those with the shorter legs.

Answer:

it's the outer membrane

Explanation:

because the outer membrane helps the mitochondrian with respiration

The item that is NOT a goal aimed at reducing pollution is "Creating policies that limit the number of children families can have". The other three items are all aimed at reducing pollution. Modifying varieties of crops and planting dates can help reduce pollution by reducing the amount of pesticides and fertilizers used in agriculture¹. Controlling erosion so that soil doesn’t flow into waterways can help reduce water pollution¹. Monitoring and controlling disease-related pollutants can help reduce air pollution¹.

Answer:

b . c y a q

Explanation: i . need points srry

College life or getting to meet people provides an opportunity to get to know someone of the opposite sex outside your own family.

Understand differences and similarities of both genders, and learn how to get along with each other.

Establish good interpersonal relationships, enrich your social life.

How to Get to Know the Person

1 Ask open-ended questions

2 Ask them questions about the future

3 Learn about the interests

4 Be curious about the life

5 Actively listen to them

6 Open up about past.

7 Invite them to hang out with closest friends

8 Spend a typical day together

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Answer:

Raynaud causes you to have episodic spasms, called vasospastic attacks, in response to cold temperatures or stress.

Explanation:

During a Raynaud's attack, the arterioles and capillaries in your fingers and toes tighten more than they should. As a result, your skin in the affected area turns white and then blue

Answer:

A

Explanation:

I hope this helps :)

The soil could become infertile due to the lack of time for nutrients to be reinserted. So, the correct option is (A).

Soil is also defined as earth or dirt which is a mixture of organic matter, minerals, gases, liquids and organisms which together support life. These are distinguished from silt by restricting the former term specifically to displaced soil.

It provides many important services for both people and the planet by putting food on our plates, purifying our water, protecting us from floods and combating drought. Soil is also important in combating climate change because it captures and stores large amounts of carbon. Without healthy soil there is no food security.

Whereas growing the same crop year after year reduces the availability of certain nutrients and depletes the soil. Monoculture leads to soil exhaustion when the soil becomes deficient in these nutrients.

Thus, the soil could become infertile due to the lack of time for nutrients to be reinserted. So, the correct option is (A).

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The only true statement about winds from the ocean is that winds from the ocean are faster

Wind simply refers to the natural movement of air.

So therefore, the only true statement about winds from the ocean is that winds from the ocean are faster

The complete question is:

a. Winds from the ocean reduce the number of clouds.

b. Winds from the ocean carry more moisture.

c. Winds from the ocean are warmer.

d. Winds from the ocean are faster.

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Answer: If you're taking the test, it's D

Explanation:

Answer:

Explanation:

To indicate what specific results will support a hypothesis

The reflecting telescope gathers more radiation than the refracting telescope. Therefore, option (D) is correct.

Reflecting telescopes use mirrors to gather and focus light, allowing for larger apertures and higher light-gathering capabilities compared to refracting telescopes, which use lenses. This design difference typically gives reflecting telescopes an advantage in terms of gathering more radiation from distant objects in space.

However, without specific information about the sizes or specifications of the telescopes in the pictures, this inference is based on the general characteristics of reflecting and refracting telescopes.

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Thinner membranes allow for a shorter diffusion distance which means a larger gas exchange within a shorter period of time and are overall, more efficient.

Because the respiratory membrane is so thin, the gases are able to easily pass from one structure to another. This process is further aided by the fact that carbon dioxide and oxygen are both lipid-soluble.

At the end of the bronchioles are tiny air sacs called alveoli. The alveoli, which are where the lungs and blood exchange oxygen and carbon dioxide during the breathing in and breathing out process, are both lipid-soluble.

Alveoli are very small organs. They are composed of alveolar tissue, but the alveoli themselves are tiny sacs clustered at the ends of the bronchioles.

Each alveolus is lined by simple squamous epithelium, which is extremely thin in order to allow oxygen diffusion while still forming an epithelial barrier between the outside air and the internal body fluids.

Due to the thinness of the respiratory membrane, gases easily pass from one structure to the next. The fact that both carbon dioxide and oxygen are lipid-soluble helps this process even more.

Thus, the respiratory membrane is made of two thin membranes from the alveolus and capillary walls.

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