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monitta
2 years ago
8

What is the value of 7C2? A. 15 o B. 21 O C. 42 O D. 49 The answer

Biology
1 answer:
VikaD [51]2 years ago
5 0
B) 21:) hope this helps<33
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In some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." Male ligers ar
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Answer:

a prezygotic barrier

Explanation:

Both wild tigers and lions are said to be reproductively isolated.

Reproductive isolation is defined as the existence of barrier between organisms of different species such that they cannot reproduce.

The mechanisms of reproductive isolation varies. While some act to prevent the formation of zygotes (in case of mating) between organisms of different species, some ensures that the resulting zygotes are invalid.

Reproductive isolation mechanisms that act to prevent fertilization and formation of zygotes are referred to as prezygotic mechanisms while those that ensure that invalid zygotes result (in case of successful fertilization) are referred to post zygotic mechanisms.

<em>The natural differences in the ranges of wild tigers and lions ensure that both animals do not mate with each other, let alone results in zygote. This is a form of pre-zygotic reproductive isolation mechanism.</em>

7 0
3 years ago
Which of the following elements are commonly found as part of biological macromolecules?
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Answer:

Biological macromolecules are organic, meaning they contain carbon. In addition, they may contain hydrogen, oxygen, nitrogen, and additional minor elements.

Explanation:

A in Bio last year.

3 0
3 years ago
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Maintaining homeostasis keeps the internal environment in the body functioning properly. Many organ systems work together and ma
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Answer:

D

Explanation:

However, the organ systems also work together to help the body maintain homeostasis. For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance. The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure.

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Select all organic compounds
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Proteins
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Nucleic Acids
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Which of the following is considered to be the most basic living unit
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The cell is considered to be the most basic living unit.
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