An association between the root nodule of a leguminous plant and rhizobium sp, is known as

A. commmensalism

B. mycorrhiza

C. parastism

D. symbiosis

Amphibian are normally found

A. on dry land and water

B. in water and on moist land

C. on moist land

D. in water

Viviparity occurs mainly in the

A. mammals

B. reptiles

C. aves

D. amphibians

The jointed structure in insects that bears organs which are sensitive to touch, smell and vibration is the

A. maxilla

B. labium

C. antenna

D. abdomen

Which of following groups is the most advanced?

A. Pteridophytes

B. Bryophytes

C. Thallophytes

D. Gymnosperm

Most monocots are easily recognized by their

A. short leaves with petioles

B. long and sword-like leaves

C. long and palm like leaves

D. short with veinlets

Water fleas, wood lice and barnacles belong to the group?

A. arachnida

B. crustacea

C. insecta

D. chilopoda

The mode of feeding in Amoeba and Hydra is

A. heterotrophic

B. holophytic

C. autotrophic

D. symbiotic

Which of the following organisms does not exist as a single free living cell?

A. Paramecium

B. Mold

C. Amoeba

D. Chlamydomonas

The center for learning and memory in the human brain is the

A. medulla oblongata

B. cerebellum

C. cerebrum

D. olfactory lobe