When the original king and queen of termites die, they are replaced by
- A. the king and queen of another colony
- B. some adult reproductives from the same colony
- C. some adult workers which are specially fed breed
- D. developing nymphs nurtured as secondary reproductives
Fishes are cold blooded because their body temperature is
- A. constantly low
- B. constantly high
- C. dependent on that of their surroundings
- D. regulated at will
Incomplete metamorphosis occurs in the
- A. butterfly
- B. grasshopper
- C. mosquito
- D. housefly
Which of the following lacks chaetae, tentacles and antennae?
- A. Snail
- B. Crab
- C. Millipede
- D. Earthworm
Which of the following is NOT true of spirogyra?
- A. Reproduces by conjugation
- B. Reproduces by fragmentation
- C. Consist of branched filaments
- D. Consist of unbranched filaments
For effective functioning of a bird’s quill feather, hooks fit on the ridge of the
- A. Vane
- B. rachis
- C. barbules
- D. barbs
Which of the following has cones?
- A. Angiosperms
- B. Gymnosperms
- C. Pteridophyte
- D. Bryophyte
Which of these animals is radially symmetrical?
- A. squid
- B. Hydra
- C. Snail
- D. Cockroach
Which of the following pairs are fully adapted to terrestrial life?
- A. Ferns and algae
- B. Ferns and mosses
- C. Bryophytes and flowering plants
- D. Flowering plants and conifers
Viruses are regarded as non-living because they
- A. can niether reproduce asexually nor sexually
- B. cannot survive in their respective enviroments
- C. do not possess characteristics that can be transmitted from one generation to the next
- D. can neither respire nor excrete
The initial volume of water poured into 60g bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil is therefore
- A. 46.7
- B. 25.0
- C. 20.0
- D. 30.0
- E. 58.3
Atmospheric nitrogen is directly replenished in nature through
- A. the activities of denitrifying bacteria
- B. the breakdown of ammonium salts in the soil
- C. the activities of nitrifying bacteria
- D. the activities of nitrogen-fixing bacteria in root nodules
- E. egestion, death and decay
The origin of mineral particles in the soil is
- A. humus
- B. water
- C. micro-organisms
- D. weathered rock
- E. organic matter
Water retention is highest in soils which are rich in
- A. sand, poor in humus and devoid of clay
- B. clay and sand, but poor in humus
- C. clay and humus, but poor in sand
- D. clay, poor in humus and devoid of sand
- E. sand and humus, but poor in clay
Soil erosion CANNOT be controlled by
- A. planting cover crops
- B. contouring of sloping ground
- C. terracing of slopes
- D. laying of mulch
- E. burning of bush
Tsetse fly is harmful to man because it is associated with the spread of
- A. river blindness
- B. malaria
- C. sleeping sickness
- D. leprosy
- E. dysentry
Which of the following is NOT caused by bacteria?
- A. Cholera
- B. Gonorrhoea
- C. Tuberculosis
- D. Onchoceriasis
- E. Typhoid
The primary and secondary hosts respectively of bilharzia are
- A. fish and man
- B. man and dog
- C. man and snail
- D. fish and snail
Which of the following food chains is in the correct sequence?
- A. Weeds → Tadpole → Beetles → Fish → Man
- B. Weeds → Tadpole → Fish → Beetles → Man
- C. Tadpole → Beetles →Weeds → Man → Fish
- D. Man → Fish → Beetles → Tadpole → Weeds
- E. Fish → Beetles → Weeds → Man → Tadpoles
A relationship between living organisms which is of mutual benefit is
- A. parasitism
- B. saprophtism
- C. ecosystem
- D. symbiosis
- E. commensalism
In mammals, stimulus is transferred from the receptor muscles to the central nervous system through the
- A. motor neurons
- B. effector muscles
- C. dendrites
- D. sensory neurons
- E. synapses