1. W hen it is cold , the blood vessels of the skin
A. dilate to increase blood flow to the skin
B. constrict to reduce the amount of blood flowing to the skin
C. dilate to reduce the amount of blood flowing to the skin
D. constrict to increase the amount of blood flowing to the skin

2. A n organism with a pair of indistinguishable genes is a
A. heterozygote
B. hybrid
C. allelomorph
D. homozygote
E. diploid

3. 'Joined skeleton' is absent in the
A. cockroach
B. spider
C. millepede
D. snail
E. house fly

4. T he fruit formed from a single flower having several free carpels is called
A. multiple fruit
B. simple fruit
C. aggregate fruit
D. dehinscent fruit
E. indehinscent fruit

5. T he function of OSSICLES {maleus, incus and stapes} in the mammalian ear is to
A. transmit vibration
B. regulate pressure
C. support of the inner ear
D. maintain balance during motion
E. secrete oil

6. W hich of these is an adaptation to a xerophytes environment
A. fleshy tissue with reduced leaves
B. extensive surface roots and broad leaves
C. thick barks and broad leaves
D. rough leaves and shallow root system
E. stunted growth surface roots

7. T he part of the central nervous system concerned with answering an examination question is the
A. Spinal cord
B. Cerebellum
C. Oryx
D. Cerebrum
E. Medulla oblongata

8. I n which of these are flagella and cilia found?
A. Flatworms
B. Protozoa
C. Colenterates
D. Annelids
E. Nematodes

9. Anaerobic respiration in yeast produces
A. carbondioxide and ethanol
B. carbondioxide and water
C. carbondioxide and oxygen
D. carbondioxide and and glucose
E. ethanol and water

10. A true climax community
A. changes from year to year
B. persists until the environment changes
C. Is the first stage in plant duccession
D. Consists of tallest trees and small animals
E. Is in a state of perturbation

11. T he major functon of swim-bladder in fish is
A. Breathing
B. Swimming
C. Diving
D. Repelling enemy
E. Buoyancy

12. T he bone of the neck on which the skull rests is
A. Odontion
B. Axis
C. Occipital
D. Atlas
E. Patella

13. T he three important organs that are situated close to the stomach are
A. liver, kidney and gall bladder
B. pancreas, liver and kidney
C. gall bladder, pancreas and spleen
D. liver, kidney and spleen
E. kidney, gall bladder and liver

14. Mucor and Spirogyra can be put in a group because they
A. Are unicellular
B. Have spores that are dispersed by wind
C. Can live independent lives
D. Reproduce sexually
E. Have bodies made up of thallus and filaments alternatively

15. I n a predator food chain involving secondary and tertiary consumers , the organisms become progressively
A. smaller
B. equal in number
C. large and fewer along the food chain
D. parasitized along the food chain as consumers get bigger
E. sparse in distribution

16. A child blood group genotype different form those of both parents and with a mother of genotype OO , can only have a father of genotype.
A. A
B. B

17. T he organ through which nourishment and oxygen diffuse into an embryo is called
A. Amnion
B. Chorion
C. Umbilical cord
D. Oviduct
E. Placenta

18. T he ridicule of a bean seedling grows most rapidly in the region
A. of the root tip
B. below the top soil
C. just around the root tip
D. just below the root tip
E. just above the root tip

19. O ne of these is not found in the urine.
A. water
B. sodium chloride
C. nitrogenous compounds
D. calcium chloride
E. nitrogenous salts

20. W hich of these is false about the piliferous layer of a root ? It
A. Has a thin cuticle
B. Is the outermost layer of the cortex
C. May bear root hairs
D. Breaks down with age
E. Is replaced by cork in old roots

21. A key similarity between nervous and hormonal system is that both
A. Involve chemical transmission
B. Have widespread effects
C. Shed chemicals into the blood stream
D. Evoke rapid response
E. Eliminate response

22. W hich one of these factors is completely abiotic ?
A. turbidity, tide, salinity, plankton
B. pressure, pH, soil insect
C. water, soil, bacteria, salinity
D. pH, bamboos, wind, rainfall
E. light, altitude, wind, humidity

23. W ind pollinated flowers usually have
A. long styles
B. sticky stigmas
C. small and short stigmas
D. rough pollen grains
E. small styles and pollen

24. T he plaintain reproduces asexually by
A. spores
B. buds
C. fragements
D. suckers
E. flowers

25. A tapeworm fasten itself to the intestine of its host with
A. neck and suckers
B. hooks and suckers
C. rostellum and suckers
D. proglottis and neck
E. rostellum hooks and suckers

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