SOMEONE PLEASE HELP ASAP!! THANK YOU SO MUCH!!!

Biology

1 answer:

blsea [12.9K]4 years ago

7 0

1- B
2-B
3-C
4-B
5-A
6-A
I cant see the options for question 7, but here are the answers for 1-6. Hope they help!

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Analyze the data about nitrogenous base content of DNA from various species. Percentages of Bases in Five Organisms Source of DN

Troyanec [42]

Answer:

When analyzing data on the nitrogenous base content of the DNA of various species, the claims are supported by the data:

In any one species, the amount of adenine closely approximates that of thymine.
In any one species, the amount of guanine closely approximates that of cytosine.
The amounts of A, T, G, and C in DNA varies from species to species.

(options A, B and D)

Explanation:

Organizing the data has to:

Source of DNA A T G C

Streptococcus 29.8 31.6 20.5 18.0

Yeast 31.3 32.9 18.7 17.1

Herring 27.8 27.5 22.2 22.6

Human 30.9 29.4 19.9 19.8

E. Coli 24.7 23.6 26.0 25.7

DNA is the molecule that contains the genetic information of each species, formed by sequences of nitrogenous bases Adenine, Thymine, Cytosine and Guanine.

Since Adenine and Thymine -as well as Cytosine and Guanina- are complementary, the percentage of them will be very similar in each DNA molecule.

The genetic information -which determines the physical and functional characteristics of each organism- is encoded in the DNA and is different for each species, so the percentages of nitrogenous bases vary from species to species.

5 0

3 years ago

When a counterfeit detection pen is used on an authentic bill, what color does it turn?

garik1379 [7]

If the bill is counterfeit and the paper is wood-based, the iodine in the pen solution will react with the starch and leave a dark brown or black mark.

7 0

3 years ago

I will give BRAINLIEST!!!!!!

Svetllana [295]

Which level of organization describes the stomach?
B.) organ
Where is starch in food first digested in the digestive system?
The mouth and small intestine both have a part in digesting starch, but the keyword is "first" so of course that would be:
A.) mouth

Hope this helped. I believe I am right, but correct me if I'm wrong. :)

6 0

4 years ago

Read 2 more answers

Which describes the basic structure of a fatty acid

Alik [6]

A fatty acid is a carboxylic acid with a long aliphatic chain. It can be saturated or unsaturated. In order to describe correctly the fatty acid, the length of the carbon chain should be given, the number of double bonds and the exact position of the double bonds.

4 0

4 years ago

What's the answer to this question

Flauer [41]

The answer is C. Thermal energy is transferred to her face by radiation, and thermal energy is transferred to the bottoms of her feet by conduction.

Conduction is a method of transferring heat by using the collision of molecules and free electrons (depending on the material). Heat is usually transferred by conduction if both objects are in contact with each other that way the molecules can collide and spread the kinetic energy thus raising their internal heat. So, since the feet and the sand are in contact, so the heat should be transferred by conduction. However, air is a very poor heat conductor, it cannot transfer heat efficiently, therefore, the first answer is not conduction.

Radiation is a method of transferring heat too but using electromagnetic waves. It works great even in the air, or even with vacuum space. The sun shining from outer space to earth through the vacuum space is also by radiation. So, the first answer is radiation.

The answer is C, hope it helps!

7 0

4 years ago