Question

Which of the following is an aquatic fern?

• A. Adiantum
• B. Dryopteris
• C. Salvinia
• D. Equisetum

Answer 1

The correct option is C

Salvinia

The correct option is C.

Explanation for Correct option:

1. Salvinia is a fern that grows in water.
2. These aquatic ferns generally grow in winter.
3. Small hairs on the leaves of some Salvinia species make them water-resistant.
4. By employing nutrients in the water and darkening certain areas of the aquarium, it helps to prevent algae.
5. Salvinia species are utilized as ornamentals.

Explanation for Incorrect options:

Option A:

1. Adiantum is also known as the maidenhair fern.
2. The parent plant of Adiantum caudatum develops new plants when its arching leaves touch the ground, earning it the nickname "walking fern."
3. Vegetative propagation is what causes the walking effect.

Option B:

1. Dryopteris ferns are also known as wood ferns.
2. A pretty fern that blooms with color in the spring. any humus-rich, wet soil.
3. Once established, the soil will tolerate dryness.

Option D:

1. Equisetum, often known as horsetail, grows in the fields.
2. To heal burns and wounds, horsetail is administered directly to the skin.
3. There have been allegations that horsetail products have been contaminated with Equisetum palustre, a similar plant.

Final answer: Salvinia is an aquatic fern.