Question

Choose the correct option which is correct for 'asexual reproduction'. Statement P:- Reproductive structures for Chlamydomonas are zoospores. Statement Q:- Amoeba undergoes both binary and multiple fission under respective conditions. Statement:- Fragmentation occurs in Hydra & sponges.

• A. Statements P is true
• B. Statements Q and R are true
• C. Statements P and Q are true
• D. Statements P, Q & R are true

Answer 1

The Correct Option is A

The correct answer is option (D): Statements P, Q & R are true
1. Fragmentation is the breaking of parts into smaller pieces. In biology, it is a type of asexual reproduction that is observed in sponges and some hydra. The fragments with time will form an entire organism. 2. Chlamydomonas is a green alga and is a unicellular flagellate. They are generally oval and circular. Chlamydomonas undergo both sexual and asexual reproduction. Asexual reproduction occurs by zoospores, aplanospores, etc. and sexual reproduction occurs through isogamy, anisogamy, etc. Zoospore is a motile asexual spore and uses a flagellum for locomotion. 3. Amoeba undergoes both binary and multiple fission. It is a form of asexual reproduction. In binary fission, the organism gets divided into two organisms each of them caring the genetic material. It is generally observed in prokaryotes and some single-celled eukaryotes. The amoeba first grows large before dividing them then the nucleus divides into two. First, the division of cytoplasm occurs followed by the division of the nucleus. Some amoeba also reproduces through multiple fission. During this process, the amoeba produces a three-layered wall of cells. This layer is called a cyst that will protect the amoeba. The nucleus will divide several times followed by the division of cytoplasm. Therefore, several daughter cells will be formed. Therefore all three statements are correct.