Question

Fertilizers are often labeled with an N-P-K value, which shows how much nitrogen, phosphorus, and potassium the fertilizer contains. Nitrogen is found in DNA and in chlorophyll, the molecule that allows plants to photosynthesize. Phosphorus is found in DNA and it also makes up energy molecules. Potassium is needed in processes such as water regulation.

Based on this information, what impact does fertilizer have on a plant?
A.
It blocks the plants ability to photosynthesize, causing the plant to grow faster and larger.
B.
It alters the genes of the plant, causing the plant to grow slower and smaller.
C.
It controls and regulates cellular processes, causing the plant to grow slower and smaller.
D.
It accelerates DNA and cellular replication, causing the plant to grow faster and larger.

Answer 1

D.

Fertilizers supply N, P and K — building blocks for DNA, chlorophyll (photosynthesis) and ATP (energy), plus ions for physiological regulation — which support increased cell division, energy production and photosynthesis, so plants grow faster and larger.