Nutrition in plants and animals (Class 7)

Which of the following statements is/are correct?

(i) All green plants can prepare their own food.

(ii) Most animals are autotrophs.

(iii) Carbon dioxide is not required for photosynthesis.

(iv) Oxygen is liberated during photosynthesis.

Choose the correct answer from the options below:

• (i) and (iv)

• (ii) only

• (ii) and (iii)

• (i) and (ii)

Pitcher plant traps insects because it

• is a heterotroph.

• grows in soils which lack in nitrogen.

• does not have chlorophyll.

• has a digestive system like human beings.

Two organisms are good friends and live together. One provides shelter, water, and nutrients while the other prepares and provides food. Such an association of organisms is termed as

• saprophyte

• parasite

• autotroph

• symbiosis

The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is

• (a) autotrophic

• (b) insectivorous

• (c) saprophytic

• (d) parasitic

When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?

• (a) Stomata

• (b) Lamina

• (c) Midrib

• (d) Veins

The piercing and tearing teeth is called

• incisor

• Canine

• Pre-molar

• Molar

____ is the largest gland in our body.

• Skin

• Hand

• Liver

• Leg

The enzymes present in the saliva convert

• fats into fatty acids and glycerol.

• starch into simple sugars.

• proteins into amino acids.

• complex sugars into simple sugars.

Mostly grass eating animals are called____.

• Carnivore

• Omnivore

• Ruminants

• Scavenger

Find the incorrect Statement:

• Enzymes break down proteins to simpler substances

• Hydrochloric acid kills enzymes

• Small intestine has a large number of villi

• Cow is a ruminant