Genetically modified food products have not become universally accepted because

A. they are not tasty as others produced by conventional means

B. they are usually costlier than others produced by conventional means

C. their effects on human consumers is not yet fully understand

D. the technology can be applied only in developed countries

A major adaptive feature of endoparasites is the

A. loss of the organ of movement

B. presence of claws

C. loss of the central nervous system

D. presence of piercing mouthparts

The abilty of a chameleon to change its colour is an adaptive future for

A. attraction

B. defence

C. display

D. attack

Which of the following is the most advanced evolutionary development in plants?

A. possession of unicellular structures

B. development of flowers

C. dispersal of spores

D. development of secondary thickening

Which of the following is a major cause of variation among organisms?

A. Inbreeding

B. Backcrossing

C. Sexual reproduction

D. Gene dominance

Use the diagram above to answer this question. Which of the organisms is characterised by the possession of a chitinous exoskeleton?

A. l

B. ll

C. lll

D. lV

Use the diagram above to answer this question.The type of reproduction illustrated in IV is

A. sexual

B. conjugation

C. binary fission

D. budding

Use the diagram above to answer this question.The vessel that carries blood from l to ll is the

A. pulmonary artery

B. pulmonary vein

C. carotid artery

D. jugular vein

Use the diagram above to answer this question.Water reabsorption takes place in

A. ll and lll

B. lll and lV

C. l and IV

D. l and lll

Use the diagram above to answer this question.Form the graph above, it can be appropriately deduced that?

A. the body temperature in ll varies with that in l

B. the body of temperature in l is independent of external temperature

C. l and ll maintain constant body temperature

D. external temperatures affect the body temperature of l and ll