Question

During the nitrogen cycle, through which structure are nitrogen compounds first absorbed into the plant?

A. Roots
B. Leaves
C. Flower
D. Steam

Answer 1

During the nitrogen cycle, nitrogen compounds are first absorbed into the plant through its roots. The roots take in nitrogen in the form of nitrates (NO3-) or ammonium (NH4+) ions from the soil. These ions are then transported to the plant's leaves, where they are used in the process of photosynthesis to produce the necessary building blocks for plant growth.

So, the correct answer is: A. Roots