Waec 2017 Biology Past Questions And Answers
A good site for secondary succession would be
- A. a sand dune
- B. a bare rock
- C. a land that has just had forest fire
- D. a stretch of barren land
Which of the following materials is not easily biodegradable?
- A. Polythene bag
- B. Cotton bag
- C. Hides and Skin bag
- D. Paper bag
A population which exceeds its carrying capacity and then collapses is represented graphically by a
- A. bell-shaped curve
- B. linear curve
- C. sigmoid curve
- D. skewed curve
Which of the following groups of organisms do not have members that can be called autotrophs?
- A. Protists
- B. Mosses
- C. Chlorophyta
- D. Fungi
Which of the following organisms cannot exist freely on its own?
- A. Chlamydomonas
- B. Amoeba
- C. Paramecium
- D. Plasmodium
The number of individuals that the environment can support over a long period of time is its
- A. growth rate
- B. total capacity
- C. population capacity
- D. carrying capacity
(a) State four characteristics of enzymes
(b) (i) List two digestive enzymes produced in the duodenum of humans
(ii) Name the substrate that each enzyme listed in 2(b)(i) acts on.
(iii) State the products of each enzyme activity in 2(b)(ii)
(c) (i) State one way in which chlorophyll is important in plants
(ii) Name two macroelements that are required for the formation of chlorophyll in plants.
(iii) State one deficiency symptom of each macroelement named in 2 (c) (ii) above
(d) Outline the proce-dure used for testing for starch in a leaf
View Discussion (0)WAEC 2017 THEORYWhich of the following ecological factors will result in food shortage?
- A. Drought
- B. Low rate of reproduction
- C. Emigration
- D. Topography
Which of the following processes are associated with photosynthesis? I. Energy from sunlight is absorbed II. Carbon dioxide is evolved III. Oxygen is given off IV. Glucose is synthesized
- A. I and II only
- B. I, II and IV only
- C. I, III and IV only
- D. I, II, III and IV
(a) A child belongs to blood group 0 and the mother be-longs to group B. With the aid of genetic cross, state the possible blood groups of the father.
(b) (i) Name two forms of adaptive communication in animals
(ii) State two reasons why organisms communicate with one an-other.
View Discussion (0)WAEC 2017 THEORY