Question

Living organisms can incorporate ______ Into their metabolism

Nitrites

Nitrates

Ammonia

Nitrogen gas

Answer 1

You can only pick one

Answer 2

Living organisms can incorporate **nitrates** and **ammonia** into their metabolism.

- **Nitrates** can be assimilated by plants and some bacteria as a source of nitrogen for amino acids and nucleic acids.
- **Ammonia** can also be directly incorporated by organisms, particularly through processes like ammonification and assimilation.

**Nitrites** are often intermediate products in the nitrogen cycle and are typically converted to nitrates or ammonia rather than directly used by most organisms.

**Nitrogen gas (N₂)** is generally not directly incorporated into metabolism by most organisms, but it can be fixed into a usable form (like ammonia) by certain bacteria (nitrogen-fixing bacteria).

So, the best answers are **nitrates** and **ammonia**.

Answer 3

If I can only pick one, the best answer would be **ammonia**.

Ammonia is a directly usable form of nitrogen for many organisms in their metabolic processes.