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GaryK [48]
4 years ago
8

What two gases together make up 99% of Earth's atmosphere?

Biology
2 answers:
Soloha48 [4]4 years ago
5 0
The two gasses that make up 99% of the earth's atmosphere are nitrogen and oxygen. 
Hope that helped! =)
s344n2d4d5 [400]4 years ago
3 0
Nitrogen<span>, </span>oxygen<span>, </span>water vapor<span>, </span>carbon dioxide,methane<span>, </span>nitrous oxide<span>,</span>
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The four types of nitrogen bases of DNA nucleotides are 1________,2______, guanine, and cytosine.
Sonja [21]

Answer:

1. Adenine

2. Thymine

Explanation:

These are the four nitrogen bases of DNA nucleotides. It's just something that you have to memorize in order to be able to successfully study DNA. In case you are asked which base pairs with which, always remember this saying about base pairs: A and T, and, G and C.

Have a nice day and please don't forget to give me Brainliest!

7 0
3 years ago
Read 2 more answers
What are major functions of the endocrine system
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6 0
3 years ago
If the rice already had the genes that could make vitamin A, why did scientists use genes from other organisms?
meriva

Answer:

A. The rice genes didn't make the right type of vitamin A.

Explanation:

Regular white rice does not have the gene to produce beta carotene. The human body converts the beta carotene into vitamin A.

To increase the nutritional value of rice, the gene for beta carotene from daffodil flowers was inserted into the cells of endosperm of rice.

This allowed these cells of the genetically engineered rice varieties to produce beta carotene. Production of beta carotene imparted golden color to the rice grain and hence, the name.

7 0
3 years ago
What could we have as a testing variable in a chicken bone experiment
lyudmila [28]
It depends, what kind of experiment

6 0
4 years ago
The A159E mutation causes an A amino acid to be replaced with an E amino acid (their structures are shown here). What effects do
denis-greek [22]

Answer:

Due to hydrophilic nature of E amino acid, it will make it self to be exposed on protein surface and will disrupt the structure and potentially the function of troponin.

Explanation:

Since the E amino acid is hydrophilic, it will try to be exposed on the surface of the protein and thus will disrupt the tertiary structure and potentially the function of troponin.

6 0
4 years ago
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