They had to adapt to the heat and to learn to survive long periods without water
Only males can be carriers for X-linked recessive traits, False, it should read "Only females can be carriers for X-linked recessive traits."
<h3>What is an allele in a gene?</h3>
An allele is defined as an allele is a variant form of a gene.
For example, if both of your parents have green eyes, you might inherit the characteristic of green eyes from them.
Or if your motherhas freckles, you might have freckles too because you inherited the characteristic for freckles
Thus, option "A" is correct.
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Vitamin D , better skin, healthier hair, etc.
The population doesn’t grow(increase) anymore and the number of organisms stay at about that point(the carrying capacity).