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Waec Biology past questions

If you have been looking for WAEC Biology past questions and answers 2020/2021? If yes, you are in the right place. Nkedugists have brought all the collection of Biology past examination questions to assist you with your studies for the West African Senior School Certificate Examination (WASSCE).

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WASSCE PAST QUESTION AND ANSWER IN BIOLOGY FOR 2020

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Biology Theory Paper 1

1. (a) Describe briefly the role of the stomach indigestion.
(b) (i) Name three parts of plants in which food can be stored
(ii) Give one example in each case.
(c) Explain briefly how the level of sugar in the mammalian blood can be regulated.

2. (a)(i) What is sexual reproduction?
(ii) Name four organs in mammals that produce sex hormones.
(iii) Name one sex hormone produced by each of the organs named in 2(a)(i).
(b) In a tabular form outline three differences between reproductions in lizards and birds.
(c) (i) How are identical twins forms in humans?
(ii) State three characteristics features of identical twins.

3. (a) Explain the following terms:
(i) disease;
(ii) symptoms of diseases
(b) (i) List two physical and two chemical barriers that prevent pathogens from penetrating the body of an organism.
(ii) Explain how vaccination protects the body from contracting infectious diseases.
(c) Distinguish between an antibody and an antigen.
(d) Name the causative agents of: (i) Malaria; (ii) Cholera; (iii) AIDS.

4. (i) What is respiration?
(ii) In a tabular form, state four differences between gaseous exchange and aerobic respiration
(b) (i) Explain the term residual air.
(ii) What is the importance of residual air to mammals?
(iii) State four characteristic features associated with respiratory structures.
(c) (i) What is oxygen debt?
(ii) Outline three activities that can result in oxygen debt.

5. (a) (i) What is conservation?
(ii) State six factors responsible for the decline of the abundance and variety of wildlife.
(b) Outline six ways in which the government can improve the situation in 5(a) (ii) above.
(c) (i) What is Eutrophication?
(ii) State two causes of eutrophication.

6. (a) What is photosynthesis?
List: (i) four external factors;
(ii) two internal factors; that affect the rate of photosynthesis.
(b) (i) List the major products of the light-dependent stage of photosynthesis.
(ii) State the importance of each of the products listed in 6(c) (i) above.
(c) (i) Explain why there are no green plants at the lower depths of some lakes.
(ii) State why decomposers are important to flowering plants.

7. (a) (i) What is a gene?
(ii) Differentiate between the terms genotype and phenotype.
(b) Explain the following terms: (i) hybrid; (ii) pure breeding; (iii) nucleotide.
(c) In garden pea seeds, the smooth seed coat is dominant over rough seed coat.
With the aid of a genetic diagram, determine the result expected if a homozygous rough pea is crossed with a smooth seed coat plant whose parent were rough-coated.

8. (a) (i)  Describe epigeal germination of a seed.
(ii) In a tabular form, state three differences between epigeal germination and hypogeal germination.
(b) (i)  What is seed dormancy?
(ii)  State three ways by which dormancy in seeds can be broken.
(c) State six advantages of using contraceptives in human populations.

Waec Biology past question

Waec Biology past question

 

Waec Biology past questions objective questions

1. A plant which grows on another plant without apparent harm to the host plant is called
  • A. a parasite
  • B. an epiphyte
  • C. a saprophyte
  • D. a predator
  • E. a hermaphrodite
Correct Answer: Option B

2. Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)

The process represented by the above equation is
  • A. protein synthesis
  • B. respiration
  • C. photosynthesis
  • D. transpiration
  • E. translocation
Correct Answer: Option C

3.

Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)
The oxygen given off during the above process is derived from
  • A. sunlight
  • B. chlorophyll
  • C. carbon dioxide
  • D. atmosphere
  • E. water
Correct Answer: Option E

This question is left for you to answer without an answer given, so find it yourself by using your textbook to confirm it after answering it.

We have ___________major types of human fingerprint (a) three (b) six (c) four (d) five

All these include the morphological variation except (a) height of the body (b) fingerprints (c) weight of individual (d) intelligent or stupid

If an albino man (bb) marries a dark-skinned woman (bb) and they have four children. how many of the children will be albino (a) 3 (b) 2 (c)0 (d) 1

A flowering plant having both the male and female flowers on the same plant is said to be (a) irregular (b) monoecious (c) irregular (d) dioecious

In Mendel’s experiment, it was disclosed that the f1 generation of a cross between a brown cook and a white hen was all brown because the greater for the (a) brown colour was dominant (b) white colour was dominant (c) brown colour was recessive (d) white colour did not combine

The function of the human red blood cell is to (a) carry oxygen (b) absorb heat (c) make antibodies (d) destroy bacteria

The part of the nervous system that interprets blinking of the age is (a) spinal cord (b) cerebrum (c) Hindi brain (d) olfactory lobe

Fish cannot survive on land because it has (a) a body covered with scales (b) a streamlined body (c) no lungs (d) no iveking

What is the different between viviparous and ovoviviparous animal (a) possession of yoked egg (b)laying of unfertilized egg(c) possession of yoked eggs (d) laying and breading of eggs

When both ovaries of the human female ovulate simultaneously and both ovaries are fertilized, then (a) identical twins are produced (b) fraternal twins are produced (c) Siamese twins are produced (d) they are genetically identical

A population is best described as(a) a group of the same species of organism living together (b) a group of animal and plant living together (c) different species of organism living together

Placentation of plant is best described as (a) arrangement of ovules in the ovary (b) arrangement of fruits on the branches (c) development of ovules in the ovary (d) formation of a percept from the ovary wall

The study of plant and animals is known as (a) ecology and morphology (b) zoology and botany (c) anatomy and variation (d) genetics and physiology

The process that ensures the continuity of life and enables it to pass from one generation to another is called (a) asexual reproduction (b) sexual reproduction (c) reproduction (d) respiration

A microscopic organism which cannot be seen by an ordinary microscope but with an electronic microscope is (a) HIV (b) AIDS (c) virus (d) malaria parasite.

The system of classification of living things used today is based by a Swiss scientist known as and in what year (a) Kingdom Phylum in 1701 – 2019 (b) Carolus Linnaeus in 1707 – 1778 (c) Lord Lugard in 1707 – 1777(d) Carolus Carbon in 1707 – 1708

Another name for eukaryotes is (a) cell with membrane (b) cell without membrane (c) unicellular cell (d) multi cellular cell

Two examples of an angiosperm plant are (a) beans and pin tree (b) balsam and mango tree (c) zea mays and oryza sativa (d) Rattus rattus

Fishes whose bones are made of cartilage are called (a) cartilaginous (b) ray fishes (c) elastic fishes (d) chordate

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