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Ivenika [448]
4 years ago
14

Approximately how many known neurotransmitters are there

Biology
1 answer:
Mila [183]4 years ago
7 0
30-100 different molecule types
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Members of different species do not produce offspring due to:
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A is the answer. I believe, although I’m not 100% sure
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Mammals reproduce through a process called sexual reproduction. During this process, which involves two A.
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With sexual reproduction a sperm coming from the male must unite with the female egg. Both are needed for this kind of reproduction, and an offspring CAN'T  be formed without both. Unlike asexual reproduction, the offspring of a mammal reproducing sexually is DIFFERENT from both parents, since the offspring is a combination of both the mother and the father.

An easy to remember example I use when thinking about what sexual reproduction is:

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