Question

Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as

• A. Heterosporous
• B. Homosorus
• C. Heterosorus
• D. Homosporous

Answer 1

The Correct Option is A

In this question, we need to identify the term used for plants that produce two different kinds of spores. Let's break down the terminology involved to understand the correct answer.

1. Understanding the Terms:
   • The term Heterosporous is used to describe plants that produce two types of spores: microspores and megaspores. These plants have sexual dimorphism in their gametophyte stage where the microspores develop into male gametophytes, and megaspores into female gametophytes.
   • On the other hand, Homosporous plants produce only one type of spore, which develops into a bisexual gametophyte.
   • The other options, Homosorus and Heterosorus, are not standard botanical terms in this context. Hence, they can be ruled out.
2. Conclusion: Based on this understanding, plants like Selaginella and Salvinia that produce two kinds of spores are best described by the term Heterosporous.

Thus, the correct answer to the question is Heterosporous. This choice is supported by the nature of spore production and differentiation seen in these genera.