Question

The seed habit in pteridophytes is considered an important step in evolution which is due to

• A. Heterospory
• B. Homospory
• C. Homogamy
• D. Heterogamy

Answer 1

The correct option is A

Heterospory

The correct option is A:

Explanation of the correct option:

Option A:

1. The term heterosporous describes plants that produce many spore types that vary in shape, size, and function.
2. They produce tiny microspores and larger megaspores, two different types of spores.
3. The majority of pteridophytes are homosporous, which means they only produce spores of the same sort.

Explanations of the incorrect options:
Option B:

1. Only one kind of spore can be seen in a homosporous occurrence.
2. Homosporous Pteridophytes is the name given to these ferns.

Option C:

1. Homogamy occurs when a flower's anthers and stigma develop at the same time.
2. As a result of self-pollination, the plant achieves homozygosity, which results in the possession of two identical copies of a particular gene from each parent.

Option D:

In heterogamy, different gametes that frequently differ in size and shape are fused during sexual reproduction.

Final answer: The seed habit in pteridophytes is considered an important step in evolution which is due to heterospory.