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Aleks [24]
3 years ago
7

In a sample of double-stranded DNA, 10 percent of the nitrogenous bases are guanine (G). What percentage of the nitrogenous base

s in the sample are adenine (A)?
Biology
1 answer:
DanielleElmas [232]3 years ago
7 0

Answer:

40%

Explanation:

Remember that guanine always pairs with cytosine, and thymine always pairs with adenine. That means that any time there is a guanine, there is always a cytosine.

If there are 10% guanines, then there are 10% cytosines. That means the total of guanines and cytosines is 20%.

The other 2 bases (thymine and adenine) have to make up the rest of the bases. That means they have to make up 100-20 = 80%.

Again, there will be equal amounts of thymine and adenine, so 80%/2 = 40%.

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Can someone help me with facts about rainforests? I have to do a project and I'm stumped.
jeka57 [31]
Rainforest cover only 2 % of the total surface area of the Earth but in spite of that about 50 % of plants and animals that live on the Earth live there.

By definition rainforests are forests that recieve high amounts of rainfall so you can actually find rainforests in Alaska for example (other examples: Canada, Asia, Africa, Latin and South-America)

About 1/4 of natural medicines are found in rainforests. 70 % or more of the plants that are used to treat cancer are found only in tropical rainforest on the planet.

Trees in tropical rainforests are so dense that it takes approximately 10 min for the rainfall to reach the ground from canopy.

7 0
3 years ago
Based on the trilobite fossil, what can you infer about the rock layers in these location? Layer a is 500 million years old. Lay
frozen [14]

Answer: Layer a is 500 million years old.

Explanation:

Trilobite is a member of the group of extinct arthropods found as fossils and they can be identified by the three-lobed as well as three segmented forms. These were the marine animals. These were appeared initially in the Cambrian Period. They used to live 542 million years ago so the fossils can be estimated to be aged of 500 above years old. These animals used to dominate in the sea area.

5 0
2 years ago
Since its inception, the theory of evolution has been the subject of frequent debate. Those who oppose evolutionary theory often
solniwko [45]

Answer:

There are lots of transitional organisms in the fossil record though it does take very specific and precise conditions for a fossil to be preserved, a deer that dies in a field will not end up in the fossil record so we are looking at a small sampling of the evidence (and a good thing too or there wouldn't be anywhere to walk with all the bones laying around)

Explanation:

8 0
2 years ago
What is the most likely function of this structure?
BartSMP [9]
I think it’s B, sorry if I’m wrong
4 0
3 years ago
Read 2 more answers
Alpa wants to change 0.54 kilometers into a smaller metric unit
wlad13 [49]

If Alpa wants to change 0.54 kilometers into a smaller metric unit, she will be required to multiply.

<h3>What is a Metric unit?</h3>

A Metric unit may be defined as a technique of measurement in which the basic units are the meter, the second, and the kilogram. These units are interchanged with one another by using several formulas of conversion.

The complete question is as follows:

Alpha wants to change 0.54 kilometers into a smaller metric unit. She will have to:

  • multiply
  • divide
  • add
  • subtract

Therefore, If Alpa wants to change 0.54 kilometers into a smaller metric unit, she will be required to multiply.

For example, In case, if she wants to convert 0.54 into meters, then she has to multiply it by 1000, that is, 0.54 * 1000 = 540 meters.

To learn more about Metric units, refer to the link:

brainly.com/question/1576704

#SPJ1

8 0
2 years ago
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