Thorns in cactus and tendrils in pea plants are called______ organs.

Explanation

To answer the question about what thorns in cactus and tendrils in pea plants are called, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organs**: We start by identifying the two specific structures mentioned in the question: thorns in cactus and tendrils in pea plants.

2. **Understand Their Functions**: Next, we note that thorns serve as a defense mechanism for cacti, while tendrils help pea plants in climbing and support.

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