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2 years ago

A student is performing experiments on a particular substance. Which

Biology

2 answers:

koban [17]2 years ago

4 0

Answer:

of what substance??

Explanation:

hammer [34]2 years ago

3 0

Answer: it burns

Explanation: a p e x

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Which statements about the circulatory system of a mollusk are true?

goldenfox [79]

<h3><u>Answer;</u></h3>

A. Gas exchanges takes place by diffusion.

B. It is an open system.

<h3><u>Explanation</u>;</h3>

Most molluscs and arthropods have an open type of circulatory system.
Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.

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2 years ago

Which option is it? Please help

Nat2105 [25]

Answer:

The correct anwser is D. Signals inside the spinal cord

Explanation:

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2 years ago

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What does these 2 models represent?

mart [117]

Answer:

It is explain about how is the cell division.and what are the examples for it.

Thera are two type of cell division.

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2.Meiosis

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2 years ago

What determinant of mean arterial pressure would be directly affected by lasix, and would this typically raise or lower mr. unde

Marysya12 [62]

<span>By definition, the two determinants of mean arterial pressure are cardiac output and total peripheral resistance. It has been shown that Lasix decreases cardiac output and total peripheral resistance. Diuretics increase urine production, so it will lower mean arterial pressure.</span>

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2 years ago

Now that you have identified the components of DNA, can you describe how these components bind together to form a DNA molecule?

omeli [17]

The question is incomplete. The complete question is attached below.

Answer:

1. DNA is the polymer of deoxyribonucleotides that contain the nitrogenous base, pentose sugar and phosphate group. The phosphate is attached with the 3 C position of the deoxyribose sugar. This leads to teh formation of phosphodiester bond.

2. The DNA backbone consists of phosphate and sugar. The nitrogenous bases are inserted inside the DNA molecule. These nitrogenous bases are linked together by the hydrogen bonds.

3. The adenine binds requires two hydrogen bonds to bind with thymine. This provide complementary nature to the DNA molecule. Uracil is present instead of thymine in RNA .

4. The guanine binds requires three hydrogen bonds to bind with cytosine. More amount of energy is required to break their bonds.

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2 years ago