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Marizza181 [45]
1 year ago
9

Why do sex cells only need half the number of chromosomes compared to other cells in a organism?

Biology
1 answer:
Viktor [21]1 year ago
6 0

Answer:

Since a species' chromosome count doesn't change from generation to generation, meiosis requires that the number of chromosomes in germ cells be cut in half. Meiosis, unlike mitosis, achieves this accomplishment by requiring a single round of DNA replication followed by two rounds of cell division.

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3 years ago
Which of the following does NOT characterize proteins?
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Answer:

The answer is C) They appear to be the molecular carriers of coded hereditary information.

Explanation:

Why NOT C) They appear to be the molecular carriers of coded hereditary information?

This is the job of the nucleic acids. It is composed of nucleotides which are the basic units of DNA and RNA. They carry genetic information about a certain organism.

<h3 /><h3>True of proteins:</h3>

A) They may be denatured or coagulated by heat or acidity.

<u>Denaturation</u> is the <u>destruction of the protein's secondary and/or tertiary structures</u>. The <u>primary structure is not disrupted due to the tough peptide bonds</u> and can only be broken down by acid. For heat denaturation, hydrogen bonds are destroyed, as in cooking of egg whites and medical equipment sterilization.

B) They have both functional and structural roles in the body.

There are many kinds of proteins that have functional and structural roles like hormones <u>(FSH, LH)</u>, antibodies <u>(IgA, IgM),</u> enzymes <u>(lipase, amylase),</u> for storage/transport <u>(hemoglobin, ferritin)</u>, and locomotion <u>(actin, troponin).</u>

D) Their function depends on their three-dimensional shape.

Just like <u>hemoglobin</u>, it's <u>quaternary structure</u> can carry <u>4 molecules of iron</u> in one go. <u>Enzymes</u> are shaped accordingly to fit a<u> specific substrate</u> <em>(lock-and-key model)</em>

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3 years ago
A particular single-celled organism uses radiant energy to fix carbon as sugars. This organism generates ATP by breaking down su
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D

Explanation:

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A researcher investigates a blood disease carried by birds she isolates an organism from the blood of an infected bird she finds
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The organism belongs to the Protista kingdom as it is unicellular, has cell walls, and has the ability to produce spores.

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Animals return water to the air through
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Transportation i guess

Explanation:

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