Biology Past Questions And Answers
1641
Overcrowding in a population does not result in
- A. death
- B. commensalism
- C. competition
- D. migration
1642
During the bending of the arm, the biceps muscles
- A. contracts and the triceps muscles relaxes
- B. relaxes and the triceps muscles contracts
- C. and the triceps muscles contract
- D. and the triceps muscles relax
1643
In mammalian development, the function of the yolk is to
- A. supply nutrients to the embryo
- B. act as the shock-absorber to the foetus
- C. supply air to the embryo
- D. facilitates the process of excretion in the foetus
1644
The gland that releases hormones into the blood are part of the
- A. digestive system
- B. endocrine system
- C. circulatory system
- D. respiratory system
1645
The reason why the flow of blood through the capillaries is very slow is
- A. because the walls of capillaries are very thin
- B. to avoid high blood pressure
- C. to ensure that the individual does not get dizzy
- D. to allow adequate time for exchange of materials
1646
Which of the following phenomena affects plants growth in an alkaline soil?
- A. Excessive plasmolysis
- B. Excessive transpiration
- C. Excessive sunlight
- D. Poor drainage
1647
Cells that utilise a lot of energy are characterized by the presence of a large number of
- A. vacuoles
- B. mitochondria
- C. endoplasmic reticulum
- D. ribosomes
1648
(a) (i) What is pollution?
(ii) State four pollutants of water
(b) Describe the effects of each of the pollutants named on aquatic organisms.
View Discussion (0)WAEC 2007 THEORY1649
Which of the following groups of substances are not six-carbon compounds?
- A. Glucose and lactose
- B. Lactose and cellulose
- C. Glucose, Lactose and Pyruvate
- D. Pyruvate and cellulose
1650
A population is best described as
- A. a group of the same species of organisms living together
- B. a group of animals and plants living together
- C. a group of insects and grasses
- D. different species of wild animals