Question

Read the given statement about algae and select the correct option.

(i) The plant body is thallus-like.

(ii) They are largely aquatic.

(iii) Reproduction occurs by vegetative, asexual, and sexual methods.

(iv) Chlamydomonas, Volvox, and Ulothrix are multicellular algae.

• A. Statements (ii) and (iii) are true
• B. Statements (i) and (ii) are true
• C. Statements (i), (ii) and (iii) are true
• D. All statements are true

Answer 1

The correct option is C

Statements (i), (ii) and (iii) are true

The correct option is C.

Explanation of the correct option:

Statement (i):

1. The thallus is typically a primitive plant body.
2. It lacks stem, root, and leaf differentiation.
3. Algae possess thallus-like plant bodies.

Statement (ii):

1. Algae are generally aquatic except for a few that grow in moist terrestrial regions like trunks, moist soil, etc.
2. Typically, algae live in freshwater or the ocean.
3. In damp terrestrial settings like tree trunks, wet rocks, moist soil, etc., very few algae can be found.
4. The plant body is generally without any differentiation into roots, stems, and leaves.

Statement (iii):

1. Algae have vegetative, asexual, and sexual methods of reproduction.

Explanation of the incorrect options:

Statement (iv):

1. Among the mentioned three, Chlamydomonas is a unicellular alga.

Final answer: The correct statements about algae are the plant body is thallus-like, they are largely aquatic, and reproduction occurs by vegetative, asexual, and sexual methods.