Question

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

• A. Their small body size
• B. Their large body size
• C. Very less oxygen requirement
• D. High rate of diffusion

Answer 1

The correct option is A

Their small body size

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