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fgiga [73]
3 years ago
14

What are the most difficult concepts for students to understand?

Biology
1 answer:
attashe74 [19]3 years ago
6 0
Duh. It's algebra. Didn't you know that?! 
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These are nucleotides that have a single ring structure. Example: Cytosine, Thymine, and Uracil
IgorLugansk [536]

Answer:

The question is incomplete.

However, I notice that your question is mainly dealing with

"Nucleotides with a single ring structure"

I tackled that part, also providing explanation to the point you focused on.

Explanation:

Nucleotides are compounds in which nitrogenous bases (purines and pyrimidines) are conjugated to the pentose sugars (ribose or deoxyribose) and at least one phosphate group. Thus a nucleotide consists of a nitrogenous base, pentose sugar and at least one phosphate group.

Examples of the nitrogenous bases are Adenine, Guanine, Thymine, Uracil and Cytosine. Of all, Thymine, Uracil and Cytosine are with single ring, while Adenine and Guanine are double ring structure.

8 0
3 years ago
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Which of the following applies to a viral infection
enyata [817]
Are there suppose to be choices?
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Which is the result of an object's motion?
iren [92.7K]

Answer:

second law

Explanation:

becuz it states that force os directly proportional to the product of acceleration and mass

f=mxa

7 0
3 years ago
Lsd closely resembles the molecular structure of what ingredient?
Kisachek [45]
The appropriate response is serotonin. LSD is a medication that modifies the client's psyche. This implies it follows up on your mind. This type of medication changes your state of mind, conduct, and the way you identify with your general surroundings. LSD influences the activity of a cerebrum substance called serotonin. Serotonin helps control conduct, inclination, the faculties, and considering
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Earth's surface winds generally blow from regions of higher
BlackZzzverrR [31]
Earth's surface wind generally blow from regions of higher AIR PRESSURE TOWARDS REGION OF LOWER AIR PRESSURE.
The direction in which the wind blow on the earth surface is a product of many factors, the most important of these factors are: pressure, friction and Coriolis effects. On the earth surface, the wind normally blow from high to low pressure. A high pressure system followed by a low pressure system allows the wind to flow in clockwise direction outward toward a low pressure system. This ensures the continuous flow of the wind. 

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