A cross between an albino female and a genetically normal male will result in offspring that are

• A. all albino
• B. all phenotypically normal
• C. all genetically normal
• D. half albino and half normal

The pollutants that contribute to the depletion of the ozone layer in the atmosphere are

• A. radioactive materials
• B. oxides of sulphur
• C. oxides of carbon
• D. chlorofluorocarbons

Example of water-borne and sex linked diseases are?

• A. taeniasis and malaria
• B. cholera and gonorrhoea
• C. typhoid and syphilis
• D. dracunculiasis and haemophilia

Th order in which organic evolution has progressed in plants is

• A. thallophyta, schizophyta, bryophyta, pteridophyta and spermatophyta
• B. schizophyta, thallophyta, bryophyta, pteridophyta and spermatophyta
• C. pteridophyta, spermatophyta, thallophyta, schizophyta and bryophyta
• D. bryophyta, pteridophyta, spermatphyta, thallophyta and schizophyta

The surest way to combine the best qualities of both parents in the offspring is by

• A. cross-breeding
• B. inbreeding
• C. selective breeding
• D. pure breeding

The set of fins that control steering, balancing and change of direction and pitch in fish is

• A. dorsal and anal
• B. pectoral and pelvics
• C. caudal and dorsal
• D. anal and pelvics

The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain

• A. animal rather than plant remains
• B. invertebrates rather than birds
• C. flowering plants rather than mosses
• D. reptiles rather than fishes

Which of the following is an adaptation of tropical rainforest species?

• A. Few stomata
• B. Thick bark
• C. Buttress roots
• D. Reduced leaves

The inner ear contains two main organs, namely, the

• A. eardrum and eustachian tube
• B. cochlea and semi-circular canals
• C. oval window and ossicles
• D. pinna and cochlea

Blood grouping in human beings is derived from combinations of

• A. two different alleles
• B. four different alleles
• C. three different alleles
• D. two different genes