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almond37 [142]
3 years ago
15

Small openings called vacuoles allow carbon dioxide to enter a leaf. True or false

Biology
1 answer:
love history [14]3 years ago
8 0
False ... small openings<span> on the underside of the </span>leaf is called <span>the stomata. </span>
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Answer 1-4 and explain
tatuchka [14]
1. is (A) because mouse and deer are not in the same ecosystem.
2.is (D) because both antelope and domestic cattle do not affect each other.
3. is (B) because food is important factor.
4.is (C) because without home it is not possible to adapt in an ecosystem.
4 0
3 years ago
Which best describes the ecosystems on Earth?
beks73 [17]

Answer:

Explanation:

B.  có nhiều hệ sinh thái khác nhau trên trái đất. mỗi hệ sinh thái có một đặc tính riêng và chúng có thể kết nối, tác động qua lại với các hệ sinh thái khác

5 0
3 years ago
The movement of which kind of molecules is controlled by osmosis? lipid protein water salt
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Hope this helps!
6 0
3 years ago
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The chemical mechanisms used to avoid errors in protein synthesis are different from those used during DNA replication. DNA poly
Savatey [412]

Answer:

(C) Aminoacyl-tRNA synthetases have an additional active site that binds to non-cognate tRNAs. The tRNAs that bind to this second active are hydrolyzed and released from the enzyme.

Explanation:

In case of translation, proof reading is done by aminoacyl-tRNA synthetases only. Aminoacyl-tRNA synthetases have two mechanisms to avoid error during translation which are mentioned as under:

<u>(1) Chemical proof reading:</u> Incorrect amino acids rather than being hydrolyzed in catalytic pocket get hydrolyzed in editing pocket and thus they hardly get attached to tRNA.  

For example: For distinguishing similar amino acids like isoleucine and valine, isoleucyl-tRNA synthetase uses a second active site which is meant for only valine not for isoleucine. In this particular site, valine which had entered the enzyme is cleaved away with the help of editing reaction after which the enzyme is well prepared to process isoleucine which is the correct amino acid for this enzyme.

<u>(2) Kinetic proof reading: </u>Even if an incorrect amino acid has entered a particular aminoacyl-tRNA synthetase, it does not cause appropriate conformational change in the enzyme because of which the incorrect amino acid loosens from the enzyme and does not get incorporated.

Note: In this example, only chemical proof reading is mentioned not kinetic proof reading.

5 0
3 years ago
Help,,,, I will give you the brainliest answer
mart [117]
I think it’s A... not sure! Because you have no A so maybe A
7 0
3 years ago
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