WAEC Biology Questions 2021 Updated Answers For Theory And Obj | Verified Expo

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WAEC Biology Questions 2021 and Answers, Free Biology Objective, theory Answers for WAEC (May/June) 2021 Biology examination. Verified WAEC 2021 Biology objective and theory answers for sure distinction in WAEC result in Biology expo runz .The West African Examinations Council (WAEC) is an examination board established by law to determine the examinations required in the public interest in the English-speaking West African countries, to conduct the examinations and to award certificates comparable to those of equivalent examining authorities internationally..

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WAEC Biology Questions 2021

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Biology

Today’s WAEC Biology OBJ Answers: (2021 Answers)

For Accuracy, Answers will be loaded in this page 2 hours to the main exam. 

WAEC Biology Obj Answers  

FIN.ACCOUNT OBJ
1-10 BDCBBACACC
11-20 BBAABDDDCB
21-30 CBADBDAADB
31-40 BCBACBCAAA
41-50 DDCDCCBBDA

 

WAEC Biology Questions 2021 Theory Answers (Expo)

6ai)
External fertilization is a mode of reproduction in which a male organism’s sperm fertilizes a female organism’s egg outside of the female’s body.

(6aii)
Internal fertilization occurs most often in land-based animals, although some aquatic animals also use this method. There are three ways that offspring are produced following internal fertilization.

6bi)
(i)Toad
(ii)Frog

(6bii)
(i)Goat
(ii)Cow

(6ci)
(i)the foetus will not get oxygen
(ii)the foetus will not get nutrients.
(iii)waste products from your baby’s blood will not be removed

(6cii)
[pick three] (i)fundus
(ii)corpus
(iii)isthmus
(iv)cervix.
====================================

(1ai)
When the head moves or changes position,the endolymph fluid in the semi-cricular canals moves and stimulates the nerve endings. The nerve endings then transmit the impulses through vestibular to the cerebellum of the brain where the new position at the head is interpreted and the appropriate responses sent to the muscular system to maintain body balance

(1aii)

(1aiii)
The middle ear in human can be split into three parts; external, mdiddle and inner. The middle ear lies within the temporal bone, and extends from the tympanic membrane to the lateral wall of the inner ear. The main function of the middle ear is to transmit vibrations from the tympanic membrane to the inner ear via the auditory ossicles.

WAEC 2021 Biology Question And Answers SECTION C:

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 arthropods?

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 streaming 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. Ribosomes

C. Lysosomes

D. Plastids

6. Active transport differs from diffusion in that active transport

A. Is a very fast process

B. Allows the movement of substances against concentration gradient

. C. Takes places in both light and dark reactions of photosynthesis

D. Occurs in both plant and animal tissues.

The diagrams below are illustration of an experimental set-up to demonstrate a type of tropic response in plants. Study them and answer question 7 and 8

waec biology questions and 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. Leaves 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 of plants.

B. Ascent of water through the xylem.

C Diffusion of coloured substances.

D. Distribution of food in plants.

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

A. Germinating cowpea.

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. Sweat

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 toward a source of light

C. Changing of the body colour of chameleon to match the colour of the foliage on which it is resting.

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

14. Ultrafiltration in the kidney takes place in the

A. Renal vein

B. Medulla

C. Loop of Henle

D. Bowman’s capsule

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

A. Midbrain

B. Kidney

C. Neck

D. Liver

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 period.

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

17. Which of the following practices 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. Cuticles

D. Mitochondria

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

waec biology
19. The adult insect in this life cycle is

A. Housefly

B. Butterfly

C. Cockroach

D. Mosquito

20. The larva is also known as

A. Nymph

B. Maggot

C. Caterpillar

D. Chrysalis

21. The source of energy required by plants during food production is

A. Photosynthesis

B. Chlorophyll

C. Sunlight

D. Microorganisms

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

A. Food for plants and animals

B Water for plants

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

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