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Sindrei [870]
3 years ago
9

_____ describes why similar organisms do not interbreed because of a physical barrier

Biology
2 answers:
Taya2010 [7]3 years ago
8 0
Is those the answer choices?
pychu [463]3 years ago
4 0

Answer:

Allopatric speciation

Explanation:

Allopatric speciation refers to the geographical isolation of two populations of a species. These isolated populations accumulate variations in time and become reproductively isolated from each other. Hence, the presence of any physical barriers such as rivers, mountains, etc. does not allow the organisms from the same species to interbreed and leads to allopatric speciation.

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In some species of Drosophila, there are genes on the Y chromosome that are not on the X chromosome. Imagine that a new allele a
mr_godi [17]

Answer:

True

Explanation:

The Drosophila like the mammals possess X and Y chromosomes but as in males in which the XX is female and XY is male, the sex In Drosophila is not determined by the presence of Y chromosomes as a male determining factor are present on the autosomes.

However, the Y chromosome is important for males as they are involved in the formation of the sperms therefore the presence of Y is important. In the given question if the allele is present ion the Y chromosome which can reduce the size therefore the allele is passed on to the males only ans no females.

Thus, true is the correct answer.

the fly is female (Bridges 1921, 1925). Thus, XO Drosophila are sterile males. In flies, the Y chromosome is not involved in determining sex. Rather, it contains genes active in forming sperm in adults.

3 0
3 years ago
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IgorLugansk [536]
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What is the difference between DNA and RNA?
aalyn [17]

DNA, is like a blueprint of biological guidelines that a living organism must follow to exist and remain functional.

RNA, helps carry out this blueprint's guidelines.

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3 years ago
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When Charles Darwin visited the Galapagos Islands in the 1800's, he observed many types of organisms that were similar but lived
anastassius [24]

Answer:

C

Explanation:

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8 0
3 years ago
A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of
adell [148]

Answer:

The correct answer is "chloroplasts and mitochondria".

Explanation:

Chloroplasts and mitochondria are two essential organelles because of its function of producing Adenosine triphosphate (ATP), the "molecular unit of currency". Chloroplasts are organelles that are found in plants and work in light conditions, whereas mitochondria could produce ATP in the dark. Since the biologist found that the heavier fraction could produce ATP in light it is very likely that it will have chloroplasts, while the light fraction that produces ATP in the dark would likely have mitochondria.

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