Jamb Biology Past Questions For Year 1992
Question 46
The hereditary materials of the cell is
- A. the R N A
- B. protein
- C. the D N A
- D. carbohydrate
Question 47
Woman do not suffer from colour blindness because
- A. the trait is sex-linked
- B. only men are colour blind
- C. the genes are recessive and sex-linked
- D. the genes occur on both the X and Y chromosomes
Question 48
Pawpaw seeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable character as the parent because
- A. seeds are not reliable for propagating plants
- B. uncontrolled out-crossing can introduced unwanted variability
- C. vegetative propagation is best form of reproduction of all crop
- D. seeds were not physiologically mature at the harvest
Question 49
Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because
- A. the deposit have remains of organisms characteristic of when they were formed
- B. different strata have remains of organisms of the same kind
- C. only organisms with strong parts are fossilized
- D. most animal and plant fossils bear little resemblance to present day living specimens
Question 50
The theory of natural selection was developed by
- A. Lamarck and Darwin
- B. Darwin and Wallace
- C. Wallace and Mendel
- D. Mendel and Larmack
