Question

Explain autotrophic, saprophytic, parasitic and holozoic modes of nutrition.

(4 Marks)

Answer 1

In autotrophic nutrition, an organism prepares its own food from simple inorganic materials like water, mineral salts, and carbon dioxide in the presence of sunlight.
(1 Mark)

The saprophytic nutrition, parasitic nutrition, and holozoic nutrition are included under the heterotrophic mode of nutrition in which the organisms depend on others for their food and cannot synthesise their own food.

In the saprophytic mode of nutrition, organisms feed on dead and decaying matter.
(1 Mark)

In the parasitic mode of nutrition, organisms live on or inside the bodies of their hosts and feed on them.
(1 Mark)
In the holozoic mode of nutrition, organisms take solid or liquid food inside their body.
(1 Mark)