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THEORY QUESTIONS

WAEC SYLLABUS

1. The scientist who introduced binomial nomenclature in the classification of organisms was.

A. Charles Darwin

B. Carolus Linnaeus

C. John Ray

D. Louis Pasteur

2. Which of the following statements is true about arthropod?

A. Prothorax bears only legs

B. Mesothorax bears only legs

C. Metathorax bears only wings

D. Prothorax bears only wings

3. What level of organization is Spirogyra?

A. Organ system

B. Organ

C. Cell

D. Tissue.

4. The steaming movement of cytoplasm within Paramecium is known as.

A. Transpiration

B. Digestion

C. Cyclosis

D. Osmosis

5. Which of the following organelles is found only in plant cells?

A. Mitochondria

B. Ribosome

C. Lysosomes

D. Plastids

ANSWERS

7. The type of response demonstrated is.

A. Phototropism

B. Geotropism

C. Hydrotropism

D. Thigmotropism

8. The conclusion drawn from the experiment is that.

A. Shoots of plants are negatively thigmotropic

B. Shoots of plants are negatively geotropic

C. Shoots of plants are positively phototropic

D. Roots of plants are positively hydrotropic.

9. The odontoid process is found on the.

A. Axis vertebra

B. Atlas vertebra

C. Thoracic vertebra

D. Sacral vertebra

10. A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was.

A. the importance of micro elements to plants

B. Ascent of water through the xylem

C. Diffusion of colored substance

D. Distribution of food in plants.

ANSWERS

11. Which of the following structures would carry out respiration?

A. Germination

B. Decolorized leaf

C. Dry leaf

D. boiled cowpea

12. Which of the following substances is not an excretory product of animals?

A. Carbon dioxide

B. urea

C. Sweet

D. oxygen

13. An example of homeostasis in living organisms is.

A. Cooling effect resulting from evaporation of water from the body surface

B. Root hairs of a plant growing towards source f light

C. Changing of the body color of chameleon to match the color f the foliage on which is resting

D. The release of photosphorus into the phloem of a plant growing in a phosphorus-deficient soil.

14. Ultra filtration on the kidney takes place in the.

A. Renal vein.

B. Medulla

C. Loop of Henie

D. Bowman’s capsule

15. The thyroid gland is located at the base of the

A. Midbrain.

B. Kidney

C. Neck.

D. Liver.

ANSWERS

16. Which of the following statements about the response of neurons to stimulus is correct?

A. Neurones respond to stimulus of any strength

B. Neurones respond to all stimuli applied in rapid succession

C. Neurones respond more rapidly during the absolute refraction period

D. Intensity of stimulus must reach a threshold value before the neurons can be excited

17. Which of the following practice may lead to infection of the eye? Use of

A. Contact lenses.

B. Convex lenses

C. Biconcave lenses

D. Concave lenses.

18. The structures for gaseous exchange in breathing roots are.

A. Stomata.

B. Lenticels

C. Cuticle

D. Mitochondria

The diagram below is an illustration of the life cycle of an insect. Study it and answer questions 19 and 20

ANSWERS

21. The source of energy required by plants food product is

A. photosynthesis

B. ChlorophyII

C. Sunlight

D. Microorganisms

22. One major difference between plant and animal nutrition is the ability of plant to synthesis.

A. Food for plants and animals

B. Water for plant

C. water for animals

D. Food for plants only.

23. By what process is starch converted into maltose.

A. Hydrolysis.

B. Condensation

C. Translocation

D. Photosynthesis

24. The ascent of water in tall trees is mainly due to.

A. Adhesive Forces

B. Transpiration Pull

C. Root Pressure

D. Cohesive force

25. The duodenum, of a person was surgically removed. Which of the following substances would have their digestion affected?

A. Starch and protein only

B. Starch and lipids

C. Starch, peptones and maltose

D. Starch, protein and lipids.

ANSWERS

27. The property is soil demonstrated is.

A. Particle size

B. Capillarity

C. Color

D. Texture

28. Which of the following statements would be a correct observation at the end of the experiment? Water moves.

A. Highest in sandy soil

B. Lowest in loamy soil

C. To the same level in all soil types

D. Highest in clayey soil

29. The most important factors that influences the ecological niche of an organism is /are the.

A. Water, light and predator-prey relationship

B. Food and water availability

C. Physical environment

D. Competition for food and space

30. The diagram below is an illustration of organisms in an air-tight aquarium. The most important factor needed by the organisms is?

ANSWERS

31. Which of the following instruments is used to determine the turbidity of water?

A. Hygrometer

B. Hygrometer

C. Secchi disc

D. Rain gauge

32. In an ecosystem. The least efficient energy transfer link is from the.

A. Secondary consumers to decomposers

B. Sun to producers

C. Primary consumers to secondary consumers

D. Producers to primary consumers.

33. Xerophytes have the following characteristics aimed at conserving water except?

A. Thick cuticle

B. Broad leaf surface

C. Sunken stomata

D. Waxy cuticle

34. An associated between living organisms in which one lives on and feeds at the expense of the other is known as.

A. Commensalism

B. Predation

C. Parasitism

D. Mutualism

35. When large numbers of organisms share limited space and resources, the immediate result is.

A. Extinction

B. Emigration

C. Competition

D. Immigration

ANSWERS

36. Which of the following disease us caused by a bacterium? A. Ringworm B. Poliomyelitis C. Syphilis D. Malaria

37. Conservation of wildlife is necessary mainly because.

A. Wild species cannot resist diseases better than their domesticated species

B. Many predator wild animals help in the control of pests

C. It prevents the extinction of species

D. Many people derive pleasure rim observing wild animals.

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with blood from the same donor. Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

38. Patients X and Y were likely transferred with blood of genotype.

A. OO

B. AQ

C. BO

D. AA

39. What should the hospital have done to prevent patients X done showing the symptom described above? patients X should have

A. Undergone an agglutination test

B. Been asked for blood group

C. Been screened to HIV

D. Undergone malaria test.

40. The greatest contribution to genetic studies was made by.

A. Gregory Mendel