Waec 2022 Biology Past Questions And Answers
which of the following practices will not maintain soil fertility?
- A. preventing soil erosion
- B. bush fallowing
- C. tendency of becoming waterlogged
- D. porosity and low water retention ability
The biological association that contributes directly to succession in a community is
- A. competition
- B. predation
- C. parasitism
- D. commensialism
A group of organisms of the same species living in a particular place is known as
- A. colony
- B. ecosystem
- C. Niche
- D. population
Study the food chain illustrated below and use it to answer this question.
J-K-L-M-N
which of the following statements about organism L is correct?
- A. feeds on organism
- B. is a primary consumer
- C. is the producer
- D. is a secondary consumer
(a) What is a sensory cell?
(b) State one function each for the following parts of mammalian eye: (i) lens; (ii) vitreous humour; (iii) optic nerve.
(c) (i) List four structures which protect the eye from injury.
(ii)Explain briefly how each of these structures performs its function.
(d) Explain why a person in a dark room is dazzled for some seconds when he is suddenly exposed to bright sunlight.
View Discussion (0)WAEC 2022 THEORYThe diagram below is an illustration of an experiment on sedimentation of soil, use it to answer this question.
The organic component of the soil is labelled
- A. I
- B. II
- C. III
- D. IV
[a]complete the table below by ticking the appropriate group to which each of the listed elements required by plants belongs
Group
| elements | microelement | macroelement |
| hydrogen | ||
| copper | ||
| magnesium | ||
| zinc | ||
| phosphorus | ||
| manganese | ||
| boron | ||
| nitrogen | ||
| carbon | ||
| oxygen |
[b] [!] state three differences between the definition of a herbivore and a carnivore
[!!] four differences between the definition of a human and a goat
[c] what are milk teeth?
View Discussion (0)WAEC 2022 THEORYwhich of the follwing pyramids is not used in ecology? pyramid of
- A. energy
- B. numbers
- C. biomass
- D. orgsnisms
An evidence of the occurrence of photosynthesis in an experiment is the?
- A. release of carbon (IV) oxide
- B. release of oxygen
- C. formation of water molecules
- D. formation and release of fructose
Two tall plants were crossed and all the F1 plants were tall. when the F1 plants were selfed, some of the F2 plants were tall while others were short what are the possible genotypes of the original plants ?
- A. Tt and tt
- B. TT and TT
- C. tt and tt
- D. TT and Tt