Question

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

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

Answer 1

The correct option is A

Heterosporous

The correct option is A.

Explanation of correct option:

1. Salvinia and Selaginella are pteridophytes.
2. Plants that produce two types of spores are known as heterosporous.
3. Meagspores and microspores are the two types of spores.
4. The female gametes, known as megaspores, are larger than the male gametes.
5. Microspores are male gametes that are smaller than microspores.
6. Salvinia is a fern that grows in water.
7. Selaginella is a multidimensional and one-of-a-kind spore ancient plant that has persisted in the planet's subtropical and tropical zones and may be effectively grown as a pot culture or in-home florariums.

Explanation of incorrect options:

Option B:

1. A sorus is a collection of sporangia.
2. The sporangia are found on the underside of fertile leaves in clusters called sori or sorus.
3. Microsporangia and megasporangium are the two types of sporangia that they create.

Option C:

1. The formation of a single type of spore is known as homospory also called isospory.
2. The size and gender of these spores are identical.
3. When these spores germinate, they produce a bisexual gametophyte that produces both male and female gametangia within the same gametophyte.

Option D:

1. A sorus is a collection of sporangia.
2. The sporangia are found on the underside of fertile leaves in clusters called sori or sorus.
3. They produce sporangia of the same type.

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