Some of the nitrogen travels as (A)_____ but much of it is carried in the (B)____ as amino acids and related compounds.

Answer

To solve the fill-in-the-blank question regarding nitrogen transport in plants, we can break it down into two parts:

### Step-by-Step Solution:

1. **Identify the first blank (A):**
- The question states, "Some of the nitrogen travels as (A)_____."
- In plants, nitrogen primarily travels in the form of inorganic ions. The most common inorganic forms of nitrogen are nitrate (NO3-) and ammonium (NH4+).
- Therefore, the answer for blank (A) is **"inorganic ions."**

2. **Identify the second blank (B):**
- The question continues, "but much of it is carried in the (B)____ as amino acids and related compounds."
- In plants, while some nitrogen is taken up as inorganic ions, a significant portion is assimilated into organic forms, particularly amino acids and related compounds.
- Thus, the answer for blank (B) is **"organic forms."**

### Final Answers:
- (A) inorganic ions
- (B) organic forms