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THEORY QUESTIONS

WAEC SYLLABUS

1. In the binomial system of naming organisms, the second name is called

A. Scientific name

B. Common name

C. Generic name

D. Specific name

2. Which of the following features does not necessarily place Paramecium at a higher level of organization over Amoeba?

A. Presence of cilia

B. Absence of pseudopodia

C. Presence of micro and meganuclei

D. Presence of more than one food vacuole

3. The living material of the cell consists of

A. Nucleus and cytoplasm

B. Cytoplasm and vacuole

C. Cytoplasm and cell membrane

D. Nucleus and cell membrane

Use the information below to answer questions 4 and 5. A pupil accidentally "watered" a potted plant with concentrated salt solution. After sometime the plant began to wilt.

4. The wilting of the plant is due to the fact that

A. The root hairs die off and can no longer absorb water

B. The salt solution causes faster rate of transpiration leading to the death of the plant cells.

C. The salt solution has caused water to be lost from plant cells leading to loss of turgor

D. The plant tissue has been poisoned by the salt which is absc rbed by the plant

5. Which of the following activities would revive the plant?

A. Covering the plant with dark paper to prevent further water loss from its surfaces

B. Leaving the plant to adapt to the condition

C. Exposing the plant to high concentration of oxygen

D. Adding more water to the soil

ANSWERS

7. To form a ball and socket joint, the structure labelled I fits into another structure in the scapula called the

A. Blade

B. Glenoid cavity

C. Olecranon fossa

D. Patella

8. The structure labelled II is called

A. Deltoid ridge

B. Trochanter

C. Shaft

D. Trochlea

9. Which of the following parts of the skeletons does not have a protective function?

A. Ribs

B. Carpals

C. Skull

D. Pelvis

10. Carbon dioxide is carried in the plasma

A. In combination with haemoglobin

B. In combination with anybodies

C. Be capillary action

D. As bicarbonate ion

ANSWERS

11. In the adult frog gaseous exchange takes place through the

A. Buccal cavity, skin and lungs,

B. Buccal cavity, skin and spiracles

C. Gills, skin and buccal cavity

D. Tympanic membrane, lungs and gills

12. The process of regulating the amount of water and solutes in the body fluids is called

A. Osmosis

B. Diffusion

C. Osmoregulation

D. Homeostasis

13. The presence of glucose in the urine of a patient is an indication of malfunctioning of the

A. Pancreas

B. Gall bladder

C. Liver

D. Spleen

14. Which of the following statements is NOT true about hormones

A. Hormones are manufactured in ductless glands and poured straight into the blood stream

B. Hormones are carried by the blood plasma to the required target organs

C. Hormonal responses are usually swift, instant and electrical

D. Once the effects of hormones are over, they are inactivated and excreted from the body

15. Which of the following actions is NOT a function of adrenalin? It increases

A. Body blood sugar by conversion of liver glycogen into glucose

B. Muscular power and resistance to fatigue

C. The rate of heart beat

D. The dilation of the pupils of the eye

ANSWERS

16. Plant hormones include the following EXCEPT

A. insulin

B. auxin

C. cytokinin

D. gibberelin

17. The passage of nerve impulse across a synapse is facilitated by the secretion of

A. Acetylcholine

B. Thyroxine

C. Insulin

D. Progesterone

18. The part of the brain which controls and coordinates body posture is the

A. Cerebellum

B. Hypothalamus

C. Medulla oblongata

D. Pons varolii

19. Which of the following processes is NOT an example of a reflex action?

A. Blinking of the eye

B. Reading

C. Beating of the heart

D. Sneezing

20. The eyes can properly focus images of objects of various distances on the retina by a process called

A. Refraction

B. Reflection

C. Accommodation

D. Correction

ANSWERS

21. Which of the following sensations may NOT be detected by the skin?

A. Touch

B. Pressure

C. Stress

D. Pain

22. The process by which flowers produce fruit without the process of fertilization is called

A. Viviparity

B. Parthenocarpy

C. Propagation

D. Metamorphosis

23. The part of the young root that pushes its way through the soil is the

A. Root hair

B. Tap root

C. Root cap

D. Lateral root

24. An example of a dehiscent friut is

A. Crotolaria

B. Tomato

C. Mango

D. Orange

25. Which of the following food substances gives the LEAST amount of calories?

A. Rice

B. Groundunts

C. Cabbage

D. Egg yolk

ANSWERS

26. Analysis of the gut content of an animal showed that it contained small pieces of bone, seeds, roughage and insects. The animal is likely to be a/an

A. Carnivore

B. Herbivore

C. Insectivore

D. Oranivore

27. Filaments of spirogyra placed in a beaker of tap water in a dark cupboard died because

A. The filaments could not photosynthesize

B. Conjugation could not take place

C. The temperature was too hot

D. The plant was over flooded

28. The importance of the concentration of chloroplast in the palisade layer of the leaf to for maximum exposure to

A. Carbon dioxide

B. Light

C. Water

D. Oxygen

29. A community is best defined as

A. Living things in a habitat interacting with the non-living part of the environment

B. The total number of individuals of one species of organisms living in a particular habitat

C. Populations of different species living together and interacting with each other in one habitat

D. The individuals of a particular group living together in an area and sharing the same resources

30. Which of the following physical factors is likely to affect the distribution of plants in a pond?

A. Light

B. Humidity

C. Wind

D. Temperature

ANSWERS

32. Tertiary consumers within the web are

A. Cat and lion only

B. Man and lion only

C. Man and cat only

D. Man, cat and lion

33. What would be the effect of taking the lion out of the web?

A. The number of organisms at each tropic level would increase

B. Man would occupy the apex of the web

C. There would be more rabbits in the web

D. The energy reaching the remaining tropic levels would increase

34. Which of the following statements about the transfer of energy in an ecosystem is correct?

A. Energy increases at higher levels

B. More organisms can be supported at higher levels

C. There are fewer organisms at lower tropic levels

D. Energy is lost at each tropic level

35. Pond weeds normally lack thick layers of cuticle because

A. Their system of photosynthesis is not efficient

B. There is no danger of becoming desiccated

C. Their leaves are either dissected or ribbon-shaped

D. There are numerous stomata on their upper epidermis

ANSWERS

36. Shrubs do NOT survive on newly weathered soils because

A. The top soil is shallow

B. Drainage on such soil is poor

C. Humus is absent from the soil

D. The soil tends to be sandy

37. The speed of the flow of water in a river is faster in the middle than along the banks due to

A. Differences in turbidity at different parts of the river

B. The abundance of fishes and other organisms along the bank

C. Reduced force of gravity in the middle portion of the rive.

D. Resistance offered by the walls of the banks

38. The effects of environmental degradation caused by human activities can be controlled by the following measures except.

A. Reclaiming the land

B. Converting mining pits into fish ponds

C. resettling indigenous inhabitants

D. Educating people

39. The following observations concerning succession are true except that the

A. Pioneer Community has fewer Species

B. Middle stages communities are most diverse

C. Climax community has the greatest number of species

D. total biomass of the community increases as succession progresses

40. A vaccine is introduced into a person's body to

A. Destroy all disease-causing organisms in the body

B. Stimulate the body to produce antibodies

C. Enhance the production of red blood cells

D. Isolate disease-causing pathogens from the blood

ANSWERS

41. Which of the following activities constitutes biological control

A. A small bony fish transported on the back of a shark

B. Adding manure to crop in a garden

C. Tilapia feeding on the larvae and pupae of mosquito

D. A vulture feeding or the carcass of a goat

42. Many diseases caused by bacteria can be treated and cured by using

A. Antiseptics

B. Antibiotics

C. Antigens

D. antibodies

43. To avoid over-fishing in a lake, the following measures may be helpful except

A. Limiting fishing period

B. Regulating the size of nets

C. Fishing throughout the year

D. Fish breeding exercise

44. Conservation may be promoted by

A. Encouraging tree planning

B. Systematic deforestation

C. Overgrazing of pastures

D. Unabated bush burning

45. Which of the following substance is not recycled in an ecosystem?

A. Carbon

B. Energy

C. Water

D. Nitrogen

ANSWERS

46. Which of the following substance about phenythiocation (PTC) is not correct

A. Some people find the taste of PTC to be bitter

B. Others find this substance to be tasteless/

C. Ability to taste this chemical is heritable

D. Ability to taste the chemical is not heritable

47. Which of the I discontinuous

A. Skin colour

B. Fingerprint

C. Ability to ability

D. Sex type

48. Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted

A. Blood groups

B. Ear shapes

C. Sex distribution

D. Heights

49. The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as

A. Allele

B. Genotype

C. Phenotype

D. Chromosome

50. The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as

A. Migration

B. Mutation

C. Mitosis

D. Meiosis

ANSWERS

51. The defective cell involved :n sickle-cell anaemia disease are

A. Phagocytes

B. Lymphocytes

C. Erythrocytes

D. Thrombocytes

52. What does the chemical composition of the genetic material of all living organisms consist of?

A. Deoxyribonucleic and

B. Adenosine diphosphate

C. Adenosine tnpbosphate

D. Follicle stimulating hormone

53. Which of the following occurrences is not a feature of meiosis?

A. Formation of four haploid cells

B. Two successive nuclear cell divisions

C. Pairing of homologous chromosomes at prophase

D. Formation of two diploid cells

54. Which of the following diseases is commonly observed in human males and is sex-linked?

A. Beriberi

B. Down's syndrome

C. Sickle-cell anemia

D. Colour blindness

55. If red is dominant and homozygous red pea-plants are crossed with homozygous white pea-plants, the first filial generation will have

A. 2 red flowers. 2 white flowers

B. 4 red "flowers

C. 4 white flowers

D. 4 pink flowers

ANSWERS

56. The resemblance of a palatable insect to a poisonous insect is an example of

A. A chemical deterrent to a predator

B. an escape from the predator by camouflage

C. An escape from the predator by mimicry

D. A defence against the predator by warning colouration

57. Which of the following statements is not true of the worker termites? They

A. Build and repair the nest

B. produce enzymes to digest cellulose

C. Search for food to feed the colony

D. Look after the nymph

58. Which of the following occurrences cannot be taken as a direct observation of Natural Selection in recent times?

A. Industrial melanism in moths

B. Selective breeding in cattle >

C. Insecticide resistance of some mosquitoes

D. Development of long neck in giraffes

59. The accepted concepts for the theory of Natural Selection does not include

A. tendency for organisms to overproduce

B. Struggle for existence

C. Survival of the fittest

D. use and disuse of body parts

60. The order of evolutionary trend in plants is

A. Bryophyta. Thallophyta, Pteridophyta and Spermatophyta

B. Thallophyta, Bryophyta, Pteridophyta and Spermatophyta

C. Spermatophyta, Pteridophyta, Bryophyta and Thallophyta

D Bryophyta, Pteridophyta, Spermatophyta and Thallophyta

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BIOLOGY (Objective Questions And Answers)

WASSCE 2008

Objectives

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ensofts

Candle Light To The World

BIOLOGY (Objective Questions And Answers)

WASSCE 2008Objectives

copyright:ensoft2024. company@en-soft.com Phone:2347072716127

WASSCE 2008

Objectives