To which blood group do universal recipients belong?

A. B

B. A

C. O

D. AB

The clumping together of red blood cells is

A. agglutination

B. fussion

C. transfusion

D. compatibility

Physiological adaptation to very dry conditions in animals demonstrates

A. rejuvenation

B. xeromorphism

C. hibernation

D. aestivation

One of adaptation of Cactus opuntia to conserve water is the reduction of

A. internodes

B. stem to leaves

C. leaves to spine

D. flower size

Which of the following structure is adapted for feeding in a bird of prey?

A. Hooked break and sharp claws

B. Smooth beak and strong claws

C. Big beaks and strong feet

D. Pointed beak and strong claws

The special pigment for colour change in chameleon is

A. melanin

B. carotenoid

C. chromatin

D. chromatophore

The behavioural adaptation in social insects could best be described as

A. symbiosis

B. saprophytism

C. parasitism

D. commensalisms

In the diagram, the structure labelled II is the

A. spermathecal pore

B. cocoon

C. clitellum

D. chaetea

The organism is found in soils rich in

A. mud

B. humus

C. clay

D. sand