Question 1

Organisms that make their own food from simple substances are called:

Accepted Answer

autotrophs. Autotrophs (e.g. green plants) synthesise their own food by photosynthesis.

Question 2

The raw materials required for photosynthesis are carbon dioxide and:

Accepted Answer

water. Plants use CO₂ and water, in the presence of sunlight and chlorophyll, to make glucose and oxygen.

Question 3

The tiny pores on the surface of leaves through which gases are exchanged are called:

Accepted Answer

stomata. Stomata allow the exchange of CO₂ and O₂ and also the loss of water vapour.

Question 4

The green pigment that traps sunlight for photosynthesis is:

Accepted Answer

chlorophyll. Chlorophyll in the chloroplasts absorbs light energy for photosynthesis.

Question 5

Amoeba takes in its food by surrounding it with finger-like extensions called:

Accepted Answer

pseudopodia. Amoeba engulfs food using pseudopodia in a process called phagocytosis.

Question 6

A plant like Cuscuta (Amarbel), which takes food from another living plant, shows:

Accepted Answer

parasitic nutrition. Cuscuta is a parasite that draws nutrients from a host plant.

Question 7

Fungi that obtain food from dead and decaying matter show:

Accepted Answer

saprophytic nutrition. Saprophytes like many fungi feed on dead organic matter.

Question 8

In humans, the chemical substances that speed up the digestion of food are called:

Accepted Answer

enzymes. Digestive enzymes break down complex food molecules into simpler absorbable forms.

Nutrition — Homi Bhabha Exam Biology MCQs with Solutions

Questions with solutions