Viruses are considered to be living organisms because they

A. possess transmittable characters

B. move from one place to another

C. respond to stimulation

D. ingest food materials

Which of the following characteristics is common to Amoeba and Paramecium?

A. Oral groove

B. Trichocyst

C. Contractile vacuole

D. Cilia

Hydra removes undigested food by

A. passing it through the anus

B. passing it through the mouth

C. means of a contractile vacuole

D. egesting it through the body surface

Which of the following groups of invertebrates reproduces by budding?

A. Arthropoda

B. Annelides

C. Mollusces

D. Coelenterata

The algae, bryophytes and pteridophytes are similar in that they

A. are sea weeds

B. have no vascular tissue

C. require moisture for fertilization

D. are microscopic plants

The spores of ferns are dispersed by

A. wind

B. water

C. insects

D. explosive mechanism

E. sporophyte

The part labelled 3 is the

A. leaf scar

B. lenticle

C. auxillary bud

D. girdle scar

Which part of the twig produces auxins?

A. 4

B. 3

C. 2

D. 1

Which of the following animals has homodont dentition?

A. Rat

B. Man

C. Lizard

D. Pigeon

In which of the following does external fertilization takes place?

A. Toad

B. Lizard

C. Bird

D. Cockcroach