To perform a testcross, scientists cross an organism with an unknown genotype with a homozygous recessive organism.
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The answer to the question presented above would be 'require frequent rainfall'. A plant native to the chaparral would be expected to require frequent rainfall. This is because it cannot survive in dry lands and without constant water.
Answer:
irreversible chemical change
Explanation:
A chemical change always results in a new substance and as it is not possible to reverse it, it is an irreversible chemical change.
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D. nRNA... hope it helps :)
They are examples of precipitation