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Fittoniya [83]
2 years ago
12

Which of the following is a pyrimidine base in DNA?

Biology
1 answer:
Andre45 [30]2 years ago
3 0

Answer:

Cytosine

Explanation:

Purine, Adenine, and Guanine are all purines

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To protect an endangered species, a group of biologists have decided to store the genes of the species. They think that this is
Afina-wow [57]

I think it is genome conservation.


3 0
3 years ago
Read 2 more answers
What are the mechanisms by which aneuploidy and polyploidy are caused? What are the mechanisms by which aneuploidy and polyploid
sleet_krkn [62]

The correct answer is:

The principal cause of aneuploidy is chromosome nondisjunction during mitosis or meiosis. Polyploidy in nature can result either from the duplication of euploid chromosome sets from a single species or from the combining of chromosome sets from different species.  

Aneuploidy is a phenomenon when there is the presence of an abnormal number of chromosomes in a cell (an extra or missing chromosome). Usually it appears as a result of improper cell division (chromosomes don’t separate) and it can cause many genetic disorders.

Polyploidy refers to a state when there are more than two sets of chromosomes (one from mother one from father). Triploid (three sets of chromosomes) and tetraploid (four sets of chromosomes) chromosomes are examples of polyploidy. This phenomenon is most common in plants.

5 0
3 years ago
A. GUC<br> B. CGU<br> C. UCG<br> D. UGU
Dahasolnce [82]

Answer:

A

Explanation:

it'll go GUC➡️CAG➡️GUC

8 0
3 years ago
What processes must a metamorphic rock go through to become an igneous rock
Damm [24]
Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. I hope my answer has come to your help. God bless and have a nice day ahead!
8 0
3 years ago
Scientists have observed that when air pollution is significantly reduced, the frequency of the melanic form of peppered moths:_
zhenek [66]

Answer:

The correct answer is : decreases

Explanation:

The development of the peppered moth is a transformative event of directional color change in the moth populace as a result of air contamination during the Industrial Revolution.

The melanic or dark color type of the peppered moth was not known before pollution level was low before 1811. Hence the decrease in pollution level in atmosphere will lowers the frequency of the melanic form of peppered moths.

Thus, the correct answer is : decreases.

4 0
3 years ago
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