Which of the following labelled structures secretes enzymes which facilitate penetration
of the egg?

A. I

B. II

C. III

D. IV

E. V

Which of the following labelled structures is similar to the locomotory structure in
Euglena?

A. I

B. II

C. III

D. IV

E. V

The part labelled I in A represents the

A. root

B. radicle

C. hypocotyl

D. shoot

E. stem

The part labelled II represents the

A. root

B. epicotyl

C. hypocotyl

D. cotyledon

E. hilum

What is the importance of the part labelled II to the seedling?
It

A. protects the foliage leaves

B. grows into the first foliage leaves

C. later develops into the fruit

D. provides the seedling with food

E. serves as the water reservoir for the seedling

In grasshopper/cockroach digestion starts from the

A. oesophagus

B. crop

C. gizzard

D. midgut

E. mouth

In a water culture experiment, the culture solution in a transparent beaker turned green. What precaution
should have been taken to prevent the culture solution from turning green?

A. Changing the culture solution regularly

B. Increasing the number of times the culture is aerated

C. Covering the transparent beaker with black cloth

D. Adding warm alcohol to bleach the green colour

E. Sterilizing the beaker in a hot oven before use

Which of the following is responsible for the conversion of nitrites to nitrates in the nitrogen cycle?

A. Denitrifying bacteria

B. Nitrifying bacteria

C. Lightening

D. Fungi

E. Brown algae

Hydra captures small crustaceans by means of

A. pseudopodia

B. musculo-epithelial cells

C. tentacles

D. enteron

E. ectoderm

Which of the following processes is not due to interaction between the biotic and abiotic components of an
ecosystem?

A. Soil nutrient depletion

B. Condensation

C. Decomposition

D. Osmosis

E. Photosynthesis