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kirza4 [7]
3 years ago
5

What is one way that changes can occur in a DNA sequence?

Biology
2 answers:
stealth61 [152]3 years ago
4 0
Mutation. A mistake made while DNA copies which causes changes in DNA
Tom [10]3 years ago
3 0
Through mistakes during DNA copying
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sattari [20]
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4 0
3 years ago
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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In the United States, which direction does a continental polar air mass that forms over Canada usually move and why?
goldfiish [28.3K]

In the United States the direction the continental polar air mass move South toward the Gulf of Mexico to replace the rising maritime tropical air mass.

Answer: Option A

<u>Explanation:</u>

Air masses are large bodies of air moving horizontally in a very uniform way.  Continental polar air mass is an air mass that forms near the poles. It originates in northern Canada and Alaska and move south then East.

The continental polar masses are the causes for the severe cold weather in the South during the cold months. Maritime tropical mass are warm and have high moisture content. During winter it comes in contact with the continental polar mass hence getting stabilized.

3 0
3 years ago
What happens to the concentration of oestrogen at ovulation?
frez [133]

Answer:

When oestrogen rises to a high enough level it causes a surge in LH from the pituitary which causes ovulation where an egg is released from the follicle (Day 14 of the cycle). The follicle becomes the corpus luteum and this produces oestrogen and progesterone which inhibit FSH and LH production by the pituitary.

Explanation:

5 0
3 years ago
robert mccrae and paul costa are known for their contribution to the big five in explaining dominant traits. please select the b
Elza [17]

The correct answer is True.

Further Explanation:

The Big Five personality traits are based around the question "who are you?" it is one of the most difficult answers each person answers about themselves.

The factors that are examined in the the Big Five are listed below;

*Openness to experience

*Neuroticism

*Conscientiousness

*Extroversion

*Agreeableness

Robert McCrae and Paul Costa are the two men who did extensive research on the subject and were the first to validate the model. The research duo have been working together since 1975.

4 0
2 years ago
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