Plant roots absorb ammonium ions and nitrate ions for use in making molecules such as dna, amino acids, and proteins

Assimilation

Explanation:

Plant roots absorb ammonium ions and nitrate ions in the process of assimilation to use these ions to make molecules like DNA, amino acids, and proteins.

Animals cannot absorb these ions directly; hence they need to consume these plants for the nutrient supplies.

it is b

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c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.