Some genera of pteridophytes produce two kinds of spores. Such plants are known

Definition of Terms

Plants that produce two kinds of spores are referred to as "heterosporous." This term applies to certain pteridophytes (ferns and their relatives) that produce both microspores and megaspores.

Explanation of Heterospory

1. Microspores: The smaller spores that develop into male gametophytes, which produce sperm.
2. Megaspores: The larger spores that develop into female gametophytes, which produce eggs.

Genera Example

Some well-known examples of heterosporous genera include:

• Selaginella: Commonly known as spike moss.
• Salvinia: A genus of water ferns.

Importance of Heterospory

Heterospory is significant because it allows for a more efficient reproductive strategy. This strategy promotes cross-fertilization and increases genetic diversity within the population, which is crucial for adaptation to changing environments.

In summary, plants with this ability to produce two types of spores are called heterosporous pteridophytes. Examples include the genera Selaginella and Salvinia, which illustrate the diversity and adaptability of these organisms.