Biology Past Questions And Answers
Movement of minerals and chemical compounds with a plant occurs during
- A. osmosis
- B. translocation
- C. transpiration
- D. diffusion
Which of the following is a plant hormone responsible for promoting cell elongation and growth?
- A. Abscisic acid
- B. Gibberellins
- C. Ethylene
- D. Cytokinins
The most common means of transmiting the Acquired Immune Deficiency Syndrome (AIDS) is
- A. from mother to child
- B. through blood transfusion
- C. through sexual intercourse
- D. through the sharing of needles
which of the follwing pyramids is not used in ecology? pyramid of
- A. energy
- B. numbers
- C. biomass
- D. orgsnisms
Which of the following adapts the aorta to the high pressure of the blood from the heart?
- A. Thin walls
- B. Fragile membrane
- C. Thick elastic walls
- D. stiff walls
In a food chain, each succeeding level in a forward direction represents
- A. an increase in the number of individuals
- B. a decrease in the number of individuals
- C. an increase in the biomass of individuals
- D. a gain in the total energy being transferred
In the diagram below, the larva is also known as
- A. Nymph
- B. Caterpillar
- C. Maggot
- D. Chrysalis
(a) List four floral parts of a flower.
(b) (i) In a tabular form, state five differences between wind and insect pollinated flowers.
(ii) Give one example of each.
(c) (i) State three agents of fruit and seed dispersal.
(ii) Give an example of fruits or seeds dispersed by each agent
(d) (i) Define the term "hormones.
(ii) Name one plant hormone.
(iii) State two effects of plant hormones.
View Discussion (0)WAEC 1998 THEORYSex - linked genes are located on
- A. Y - chromosomes
- B. X - and Y - chromosomes
- C. homologous chromosome
- D. X - chromosome
Which of the following is not a function of the liver in mammals?
- A. Storage of some vitamins
- B. Conversion of glycogen into glucose
- C. Deamination of excess nitrogenous substances
- D. Filtration of urea from the blood