Question

Identify the correct statement for spirogyra, leishmania and hydra

• A. they reproduce sexually.
• B. they are unicellular.
• C. they are multicellular.
• D. they reproduce asexually.

Hint:

Asexual reproduction methods:

• Spirogyra \(\Rightarrow\) Fragmentation
• Leishmania \(\Rightarrow\) Binary fission
• Hydra \(\Rightarrow\) Budding

Answer 1

The Correct Option is D

Step 1: Understand the organisms.

• Spirogyra: A filamentous green algae found in freshwater. It is multicellular and reproduces both sexually (conjugation) and asexually (fragmentation).
• Leishmania: A unicellular protozoan parasite that causes leishmaniasis. It reproduces asexually by binary fission.
• Hydra: A multicellular freshwater organism belonging to phylum Cnidaria. It reproduces both sexually (during unfavorable conditions) and asexually (by budding).

Step 2: Analyze each option.

• (A) they reproduce sexually: Incorrect. While Spirogyra and Hydra can reproduce sexually, Leishmania reproduces only asexually.
• (B) they are unicellular: Incorrect. Spirogyra and Hydra are multicellular; only Leishmania is unicellular.
• (C) they are multicellular: Incorrect. Leishmania is unicellular, not multicellular.
• (D) they reproduce asexually: Correct. All three organisms can reproduce asexually: Spirogyra by fragmentation, Leishmania by binary fission, and Hydra by budding.

Final Answer: (D) they reproduce asexually.