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3 years ago

What is at the start of each food chain?

Biology

2 answers:

Sladkaya [172]3 years ago

8 0

4. The sun because producers (plants) get their energy from the sun

Vladimir79 [104]3 years ago

5 0

Answer:

The sun.

Explanation:

Producers use the sun to produce their own food, followed by primary consumers which eat the plants, and secondary consumers which eat the animals that eat the plants. Circle of life.

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Capillaries that have a perforated lining are called__________.

blagie [28]

C. Fenestrated capillaries have intracellular perforations.

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3 years ago

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Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. Oxygen wil

Juli2301 [7.4K]

The two cells of the similar shape, and size have different levels of the ongoing metabolic activity. On one hand, the cell a is metabolically quiet, which means that no energy consuming chemical reactions are taking place in this cell. On the other hand, the cell b is actively consuming the surrounding oxygen. In this scenario, the oxygen will more quickly diffuse into the cell b because the diffusion gradient for oxygen in this cell is steeper than in the cell a.

Hence, the blanks can be filled with 'b and the diffusion gradient is steeper' respectively.

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3 years ago

List and describe three ways that bacteria can acquire new genetic material

OLga [1]

Answer:

The three most common ways that bacteria diversify their DNA are transformation, conjugation, and transduction. Genetic Material: the material in our cells that makes us who we are inside and out.

Deoxyribonucelic Acid (DNA): hereditary material found in the nucleus.

Ribonucleic Acid (RNA): genetic material that differs from DNA through its chemical bases.

DNA contains all the secrets that make you so awesome! So, it is super important that the cell keeps the DNA safe. DNA has so much information that it could stretch from the earth to the sun four times! No seriously, four times! I'm sure you're thinking, how does all that information get into something so small? Well, DNA is highly organized in order to keep all information safe, yet accessible to the cell. This is a great thing because you don't want to lose your awesomeness! DNA is comprised of four chemical bases also known as nucleotides: adenine (A), guanine (G), cytosine (C), and thymine (T). These bases pair with one another, A with T and C with G. Each base is attached to a sugar (ribose) and a phosphate molecule: hence the name deoxyribonucleic acid.

Now that we have the basic building blocks of DNA, let's get into the structure. DNA is double stranded, and each strand is held together by the pairing of the nucleotides. Remember what we mentioned above: A loves T and C loves G. These bases never cheat on one another; they only pair with the partner they love! The double stranded DNA is spirally coiled to form a helix. You will find many textbooks refer to DNA as a double helix. This double helix looks much like a ladder with the nucleotides representing the rungs on the ladder and the sugar and phosphate are the sides. The double helixes are then wrapped around proteins called histones and packaged into chromosomes.

The other type of genetic material called ribonucleic acid (RNA) is structurally similar to DNA, but there are a few differences--primarily in their chemical bases. Before we get more into the differences, let's examine the similarities. Both have a sugar, phosphate group, and four chemical bases. Unlike DNA which is double stranded, RNA is single stranded. The other major difference is the bases that are found in RNA. RNA contains adenine (A), guanine (G), cytosine (C), and uracil (U). So, in RNA the base thymine is replaced with uracil. In RNA the base pairs are A loves U and C loves G.

Explanation:

Brainliest please?

8 0

3 years ago

Nerves designated by Roman numerals and by names that indicate their primary functions and/or the general distribution of the th

nasty-shy [4]

Cranial Nerves are paired nerves, since there is one for each side of the body, there are a total of 12 nerves and they are named with Roman numerals and by names that indicate their primary functions.

<h3>What are Cranial Nerves?</h3>

They are a set of nerves that come directly from the brain, unlike the rest of the nerves of the nervous system.

Each pair is numbered with a Roman numeral depending on whether the position from which they leave the brain more or less near the frontal area.

Therefore, we can conclude that Cranial Nerves are paired nerves, since there is one for each side of the body, there are a total of 12 nerves and they are named with Roman numerals.

Learn more about Cranial Nerves here: brainly.com/question/14097756

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2 years ago

Dissociative identity disorder is no longer controversial as the production of books and movies has raised a new understanding o

PtichkaEL [24]

The statement is False.

As the movies and books only heighten the controversy associated with the disorder.

<h3>What is Dissociative identity disorder?</h3>

Dissociative identity disorder is a mental illness in which the person is diagnosed with having two or more different personalities with memory gaps or forgetfulness in between these different personality states.

The disorder is a controversial one, and the movies and books focusing on the disorder have failed to reduce this controversy as these books and movies often associate the disorder with violence and crime and ignore other important aspects of the mental problem.

Hence the movies and books only heighten the controversy associated with the disorder.

To learn more about Dissociative identity disorder click here:

brainly.com/question/9873821

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2 years ago

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