Question

Palmella stage is:

• A. Reproductive structure of Anthoceros
• B. Perennating structure of Chlamydo-monas
• C. Perennating structure of Chara
• D. Perennating structure of Marchantia

Answer 1

Answer:

B. Perennating structure of Chlamydo-monas

The palmella stage is a short-term, asexual reproduction stage in some algae, such as Chlamydomonas and Ulothrix, that occurs when conditions are unfavorable. During this stage, the algae cells divide repeatedly to form daughter protoplasts, which then surround themselves with a gelatinous wall. The daughter protoplasts are called palmellospores. The parent cell wall also gelatinizes, creating a mucilage capsule that encloses all the daughter protoplasts. This capsule resembles a large colony, and is named after the algae Palmella because early researchers thought it was a separate species.