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Correct 2020 WAEC Biology Theory and Objectives Questions and Answers, 2020 WAEC Biology Answers, 2020 WAEC Biology Expo
Below are the tips and Correct 2020 WAEC Biology Answers
The West African Examination Council is an examination body that set questions yearly from areas student should, after their studies in the senior secondary school, be able to write and pass without stress. The following are the correct answers to WAEC Biology 2020
Prepare very well for the Biology Exams
Preparation is the key to success. Without your preparation towards the forthcoming Biology exams, you can not know the correct answers to the questions presented before you. Read for your exams
Use Biology Recommended textbooks
The West African Examination Council has outlined some recommended text that will be very useful to you in the course of preparing for the exams. the recommended textbooks are there to help you because the pattern of questions set is likely to be the same as that of the recommended texts. Hence the use of the WAEC recommended texts is the key to success.
Have self-confidence
No one owns yourself, you are the owner, try and coordinate yourself during the exams because nothing in the exams hall is new. I tell you, with self-confidence, you will conquer.
2. Pray to God concerning your Biology exams
The Almighty God is your Creator, he cannot hide his face from you if you seek his face. Pray to God for through Him everything is possible in your WAEC Biology day.
3. Go to the Biology exams venue early
Punctuality is another factor that determines success in exams. You have all days to prepare before your WAEC Biology exams commence. Do not claim to be busy while you suppose to be in the exams venue. Go earlier and settle before the exams start.
4. Follow strictly the instruction on the maths exam paper
Many candidates overlook the instructions given in the exams hall. They think the instructions are not important. this is not good, adhere to the instructions and you will come out the best in your WAEC Biology exams.
WAEC 2019/2020 Biology Objectives and Theory Questions and Answers
Below are sample questions showing how the questions will be like
1. Which of the following statement is NOT true of symbiosis?
A) Symbionts must be living
B) It is an association of ‘give and take’
C) The association may involve two plants
D) Association between two similar species
E) Symbionts derive mutual benefit
2. A surprising fact about sickle cell disease is that it
A) affects only black people
B) kills the patient
C) is hereditary
D) affects blood cells
E) weakens the patientNitrification means
A) conversion of nitrates to nitrogen
3. Which of the following statements is NOT true of menstruation?
A) It occurs monthly
B) The discharge contains amniotic fluid
C) Its signifies no conception
D) It involves the lining of uterusE) It may cause pains
Section B [Essay]
Answer any FOUR questions.
Write your answers on the answer booklet provided.
1. (a) Describe briefly the role of the stomach in digestion.
(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, 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.
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