Jamb Biology Questions - Characteristics of Living organisms
Question 16:
In man, identical twins occur when
- A An ovum is fertilized by a sperm and then divide into two, each forming a separate embryo
- B An ovum fertilized by two sperms and then divides into two, each forming an embryo
- C Two ova are fertilized at the same tine each forming an embryo
- D Two ova are fertilized by a single sperm each forming an embryo after fertilization
- E One ovum first divides into two and each half is fertilized by a sperm before developing into an embryo
Question 17:
A pyramid of numbers can be defined as
- A The number of plants and animals in an ecosystem
- B An arrangement of organism according to their habitat
- C The numerical relationships of a food chain
- D The number of plants and animals in a population
- E The total number of species and general in a community
Question 18:
In man, spermatozoa are never found in the
- A Testis
- B Urethra
- C Epididymis
- D Prostrate glands
- E Vas deferens
Question 19:
In the figure above the structured labelled X is the
- A Cellulose cell wall
- B Plasma membrane
- C Nuclear membrane
- D Mucilage wall
- E Ectoplasm
Question 20:
The movement of plant in response to external stimulus of no particular direction is
- A Taxism
- B Tropism
- C Hyptotropic movement
- D Nastic movement
- E Phototropism