Biology Past Questions And Answers
The presence of sunken stomata and the folding of leaves are adaptations to
- A. Prevent entry of pathogens
- B. Reduce water loss
- C. Remove excess water
- D. Prevent guttation
I. Adoption of appropriate nocturnal habits ll. Burrowing lll. Adjusting their internal body temperature. IV Possession of many sweat pores. Which of the above are ways in which desert animals adapt to extreme heat of the environment?
- A. I and IV only
- B. ll and lll only
- C. l and ll only
- D. l, ll and lll only
(a)(i) What is respiration?
(ii) Name two types of respiration.
(iii) Write in words the equation representing the type of respiration that occurs in the muscle during strenuous exercise.
(b) Name two diseases that can affect the above mentioned system.
(c) Mention the structures used for gaseous exchange in the following organisms:
(i) Amoeba
(ii) Cockroach
(iii) White mangrove
(iv) Hibiscus.
View Discussion (0)WAEC 2003 THEORYWhich of the following food substance will produce a brick-red colour when warmed with Benedict's solution?
- A. Glucose
- B. Starch
- C. Egg white
- D. Maltose
The study of how and why population size change over time is
- A. Population estimation
- B. Population dynamics
- C. Population ecology
- D. Population Cycle
In testing for a reducing sugar, the food substance is usually warmed with
- A. sulphuric acid
- B. million's reagent
- C. sudan III
- D. Benedicts's solution
All living cells require water because it
- A. is a medium for all metabolic reactions
- B. is a medium that neutralizes the acids in cells
- C. is the main source of energy for the cell
- D. prevents the development of dieseases in cells
Which of the following statements about the heart is true?
- A. The heart is responsible for the production of red blood cells
- B. The heart pumps oxygenated blood to the lungs
- C. The heart receives blood from the kidneys and filters waste products
- D. The heart is a muscular organ that contracts to circulate blood throughout the body
The following pair of ions is involved in transmission of impulses by neurons:
- A) K and Na ions
- B) Na and Mg ions
- C) K and Cl ions
- D) K and Ca ions
In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
- A. it is produced by green plants during photosynthesis
- B. it is produced during respiration of animals
- C. it is absorbed inn ocean water
- D. green plants release it during the day