Which of the following conditions is NOT necessary for photosynthesis to take place?

A. ChlorophyII

B. Light

C. Carbon(II)oxide

D. Carbon(IV)oxide

The insects in which the maxillae are modified into a long coiled proboscis is

A. housefly

B. butterfly

C. mosquito

D. grasshopper

When a cell is placed in solution and the size of the cell increases, the concentration of solution is said to be

A. isotonic

B. dilute

C. hypotonic

D. hypertonic

Which of the following plant hormone is responsible for ripening of fruits?

A. Gibberellins

B. Abscisic acid

C. Ethylene

D. Cytokinins

The ability of a living organism to detect and respond to changes in the environment is referred to as

A. locomotion

B. taxis

C. irritability

D. growth

An example of an endospermous seed is

A. been seed

B. cashew nut

C. cotton seed

D. maize grain

Which of the following theories was NOT considered by Darwin in his evolutionary theory?

A. variation

B. survival of the fitest

C. use and disuse

D. competition

Which of the following protects the essential parts of the flower at bud stage?

A. Stamens

B. Sepals

C. Petals

D. Carpels

Which of the following is an agent of a sexually transmitted disease?

A. Entamoeba histolytica

B. Salmonella typhi

C. Treponema pallidum

D. Clostridium tetani

Which of the following animals has homodont dentition?

A. Rat

B. Man

C. Lizard

D. Pigeon