Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?

A. Claws

B. Gular fold

C. Scaly skin

D. Nuchal crest

E. tail

Which of the following statements best explains the term aestivation?

A. a device for survival during a period of extreme food and water shortage

B. A method of survival adopted by plants during dry season

C. Movement of animals over long distance

D. A method of survival adopted by animals under favourable condition

E. A device for rapid multiplication during abundance of food

The phenomenon whereby some organisms with certain features get established in an environment is known as

A. partial selection

B. artificial selection

C. natural selection

D. mutation

E. colonization

Who formulated the theory of natural selection in evolution?

A. Louis pasteur

B. Robert Hooke

C. Jean Lamarck

D. Mathias Schlieden

E. Charles Darwin

The wing of a bat and that of a bird, the flippers of a whale and the fins of s fish are example of

A. adaptive radiation

B. vestigial structures

C. continuous variation

D. convergent evolution

E. divergent evolution

In an individual who is heterozygous for a particular character, the hereditary factor that is always expressed is described as

A. allele

B. sickle-cell gene

C. dominant gene

D. chromosome

E. sex-linked character

Which of the following statements best explains the meaning of homologous chromosomes?

A. Product of division of chromosomes

B. two identical chromosomes from each parent

C. chromosome arranged on spindle fibre during cell division

D. chromosome arranged on the equatorial plate of the cell

E. Daughter chromatide in the first melotic division