Question

Ritu learned that excretion removes harmful metabolic wastes, i.e. nitrogenous wastes from the body. Different processes are employed in varied organisms depending on body’s organisation.
Read the passage and answer the following questions.
(i) Why can’t diffusion be carried out as excretory process in multicellular organisms?
(ii) Aquatic animals usually excrete ammonia as excretory waste. Give reason.
(iii) List the values observed in Ritu.

Answer 1

(i) : because in unicellular organisms they have a direct contact with environment, so they can easily carry diffusion process but in multicellular they do have not direct contact with environment. they have specific part for specific function of body.