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malfutka [58]
3 years ago
15

What are eggs with tough protective shells developed for?

Biology
1 answer:
Salsk061 [2.6K]3 years ago
8 0
To protect them for predators, parasites, and germs<span />
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Nondisjunction during meiosis results in an abnormal number of chromosomes in one or more gametes. In some cases of nondisjuncti
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Answer:

haploid (n) or triploid (3n)

Explanation:

If none of the chromosomes separate during meiosis, the resulting gametes will either lack chromosome or have diploid number (2n) of chromosome instead of a haploid number.

If an egg without chromosome (o) fertilizes a normal sperm (n), the resulting zygote will have haploid number (n) of chromosome.

If an egg with diploid number of chromosome (2n) fertilizes a normal sperm (n), the resulting zygote will be a triploid with 3n number of chromosome.

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Having a repetitive enzyme system would allow more than one enzyme to catalyze a particular reaction. If one of the types of enzyme is not able to perform its function due to temperature or any other factor, then another kind of enzyme would be able to catalyze the reaction. Hence, having repetitive enzyme systems is very effective in carrying out the metabolic functions of the body even when conditions are not favourable.

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Who recognized that different layers of rock contained unique collection of fossils?
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