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I am Lyosha [343]
3 years ago
9

Someone please help I took the picture this is my last question on my homework

Biology
1 answer:
Yanka [14]3 years ago
6 0

Answer:

According to the image that represents a cell in the human body, the true statement is that structure 4 is the cell membrane that provides exchange of O₂ & CO₂.

Explanation:

In cells, the cell membrane acts as a semi-permeable barrier to the passage of substances, including nutrients and oxygen (O₂).

One of the functions of the cell membrane is to allow the exchange of O₂ —necessary for the cell— and carbon dioxide (CO₂), a product of cell metabolism that must be removed.

In the image, the structure identified with the number 4 corresponds to a cell membrane of human cells that provides this gas exchange.

The other options are not correct because:

  • <em>Structure 1 is a ribosome, not a </em><u><em>chloroplast</em></u><em>. </em>
  • <em>Structure 2 is the nucleus, not a </em><u><em>vacuole containing DNA</em></u><em>. </em>
  • <em>Structure 3 is a </em><u><em>mitochondria</em></u><em>, but protein synthesis does not occur there.</em>
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Answer:

Option (2).

Explanation:

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The bacteria that can restore the biosyntheic activity in the environment can be considered as mutagen. The mutant bacteria can be easily identified in the Ames test.

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<em>Note: Due to technical problems, you will find the explanation in the attached files.</em>

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ZanzabumX [31]

Answer:

<em>The correct option is D) It does nothing to protect the atmosphere over Antarctica.</em>

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