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vaieri [72.5K]
3 years ago
12

What must happen before a chemical recreation can begin?

Biology
1 answer:
ddd [48]3 years ago
3 0

Answer:

The activation energy must be reached. The catalyst makes lower energy pathways available.

Explanation:

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The correct answer would be -

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A mature male or female haploid germ cell that fuses with another gamete of the opposite sex during the process of fertilization to make a zygote in sexual reproduction.

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4). if dominant Y and R are on the same chromosome, 50% crossing over produces 4 types of gametes, YR, Yr, yR & yr.

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