Spot the mistakes in the given statements and correct them.
a) Certain gymnosperms lack chlorophyll and home mycorrhizal roots.
b) The plant absorbs nourishment from humus through their mycorrhizal roots.

Explanation

### Step-by-Step Solution:

**Step 1: Analyze Statement A**
- The original statement is: "Certain gymnosperms lack chlorophyll and home mycorrhizal roots."
- Gymnosperms are a group of plants that typically have seeds that are not enclosed in an ovary (naked seeds). Most gymnosperms, such as conifers, do have chlorophyll and can perform photosynthesis.

**Step 2: Identify the Mistake in Statement A**
- The mistake in this statement is the mention of "gymnosperms." The correct term should be "angiosperms," as certain angiosperms (like Monotropa) can lack chlorophyll and rely on mycorrhizal relationships for nourishment.
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