Question

Amoeba and Volvox do not require any respiratory pigment to transport oxygen. The possible reason could be …………………………

• A. Their body size and number of cells is small
• B. Their body is large
• C. Requires very less oxygen
• D. Rate of diffusion is very high

Answer 1

The correct option is A

Their body size and number of cells is small

Amoeba and Volvox do not require any respiratory pigment to transport oxygen. The possible reason could be their body size and number of cells are small unlike multicellular organisms which are large and have specialized organs .Due to multicellularity and specialisation, diffusion alone will not suffice.