An evidence of a common ancestral for fishes, amphibians, reptiles, birds and mammals is the
- A. possession of wings by birds and bats
- B. cold-bloodedness of fishes, amphibians and reptile
- C. presence of gilll clefts in vertebrate embryos
- D. possession of scale by fish and reptiles
The only caste in the termite colony are the members can feed themselves are the
- A. reproductives
- B. workers
- C. nymphs
- D. soldiers
When an animal has a dark-coloured dorsal surface and a light-colouration ventral surface, this is an adaptation called
- A. concealment colouration
- B. countershading
- C. colour blending
- D. disruptive colouration
When a peacock displays its colourful feathers, it is
- A. ready for a fight
- B. protecting itself from predators
- C. protecting its mate from predators
- D. courting a female
The association in which one member benefits and the other is relatively unaffected by the interaction is termed
- A. symbiosis
- B. parasitism
- C. commensalism
- D. mutualism
A yellow maize is crossed with a white maize and the first filial generation produce yellow maize only. The white trait is said to exhibit
- A. dominance
- B. recessiveness
- C. codominance
- D. incomplete dominance
Which of the following is the best explanation for a child who is phenotypically short and born of two tall parents
- A. The father possesses a gene for shortness
- B. The mother posesses a gene for shortness
- C. Nature makes the child short
- D. Both parents possess gene for shortness
A non – renewable alternative source of energy is
- A. wind generator
- B. solar panels
- C. nuclear energy
- D. hydroelectric power
The recycling method of solid waste disposal is unsuitable for
- A. organic matter
- B. glass
- C. plastic
- D. metal scraps
The importance of practising crop rotation in agriculture is to
- A. maintain soil fertility
- B. improve the nutritional value of crops
- C. control soil erosion
- D. ensure the growth of crops
which of the following is used to test for the presence of lime in a soil sample?
- A. H2SO4(aq)
- B. NaOH(aq)
- C. HCl(aq)
- D. HNO3(aq)
Secondary succession is much faster than primary succession because
- A. pioneer colonizers are more in number
- B. soil is already present
- C. secondary seres require less nutrients
- D. species competition is increased
The population density of Tridex in an abandoned square farm land of side 200 m was found to be 5 plants per m2. The population size of the plant on the farm is
- A. 40
- B. 1000
- C. 40000
- D. 200000
In Nigeria, the guinea savanna belt borders the
- A. mangrove swamps and the sahel savanna
- B. rainforests and the sudan savanna
- C. desert and the sudan savanna
- D. rainforests and the deserts
The Mambila plateau is a unique Nigerian biome located in
- A. Plateau state
- B. Borno state
- C. Taraba state
- D. Benue state
The main reservoir of water in the circle is the
- A. cloud
- B. ground water
- C. plant
- D. ocean
Evapouration and transpiration are respectively represented by the components labelled
- A. I and II
- B. II and III
- C. III and IV
- D. IV and I
At which temperature will cockroaches not survive after 10 days
- A. 15oC
- B. 19oC
- C. 24oC
- D. 33oC
from the diagram above the optimal temperature for breeding cockroaches is
- A. 15oC
- B. 19oC
- C. 24oC
- D. 33oC
Which of the following is a homostatic response in humans?
- A. Withdrawing the hand from a hot object
- B. The mouth getting watery when food is sighted
- C. yawning owing to tiredness
- D. shivering in a cold environment
A function of the part labelled II is to
- A. equalize pressure on both sides of the tympanum
- B. conduct sound waves to the brain
- C. help the animal maintain balance or posture
- D. transform sound waves into electric impulses