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White raven [17]
4 years ago
13

How would absence of atmosphere affect the earth?​

Biology
1 answer:
valentina_108 [34]4 years ago
7 0

Answer:

If there is no atmosphere the sun rays will directly come to us and it will damage our eyes. and we cannot fly rockets also..

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Ectothermic
s344n2d4d5 [400]

Answer:

reptiles

Explanation:

the reptiles is my favorite

3 0
3 years ago
During the second and third trimesters of pregnancy, the woman's energy needs increase by how many kilocalories per day
Leviafan [203]

During the second trimester of pregnancy, the woman's energy needs increase by 340 Kilocalories per day, while during the third trimester of pregnancy, the woman's energy needs increase by 450 Kilocalories per day.

 

Second trimester: 340 Kilocalories per day

Third trimester: 450 Kilocalories per day

4 0
3 years ago
Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. 4
Rasek [7]

Natural selection would probably favor different varieties in the different islands. In other words, beaks changed as the birds developed different tastes for fruits, seeds, or insects picked from the ground or cacti (due to lack of food resources). Long, pointed beaks made some of them more fit for picking seeds out of cactus fruits.

Hope This Helps!

7 0
4 years ago
When a tautomeric shift occurs, the resulting nulceotide is a(n) __________ of the nucleotide prior to the shift?
sdas [7]
It is the structural isomer. It is a type of isomerism in which particles with the same sub-atomic equation have distinctive holding designs and nuclear association, instead of stereoisomerism, in which sub-atomic bonds are dependable in a similar request and just spatial game plan contrasts.
6 0
4 years ago
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
4 years ago
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