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WAEC Biology Practical Questions and Answers 2022/2023 (Complete Solution)

WAEC Biology Practical questions and answers 2022. Many WAEC candidates find it difficult to answer the WAEC Practical Biology correctly due to not understanding the questions. I will show you the best way to answer WAEC Biology Practical questions PDF and make a good grade in your Biology examination.

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You need to understand the WAEC Biology Practical making scheme before attempting any question so as to present your answers in such a way that it will look attractive to the examiner to earn you big marks.

Bear in mind that every single procedure is awarded marks. So, ensure you do not skip any step while reporting and presenting your practical results. And do not forget to remember that neat labeling is very important.

You will be expected to carry out an experiment and report your observation. What you will see will not be far from the WAEC Biology Specimen given to your school.

Note: Scroll to the bottom for today’s practical Biology answers.

WAEC Practical Biology Questions and Answers

Today’s WAEC Biology Practical Answers Loading…

The 2022 WAEC Biology Practical Questions and Answers (expo) will be posted here tomorrow, 17th June during the Practical Biology exam before the exam starts.

Keep checking and reloading this page for today’s WAEC Biology Practical answers (Bio Practical expo). WAEC 2022 Practical Biology Answers Loading…

Today’s WAEC Biology Practical answers.

(1a)

A: Annual crop

C: Annual crop

(1b)

TABULATE

SPECIMEN A:

(i) Presence of hole

(ii) Brownish in colour

(iii) It is dry

(iv) It is hard when touched

SPECIMEN C:

(i) Absence of hole

(ii) Whitish in colour

(iii) It is wet

(iv) It is soft when touched

(1c)

(PICK ANY THREE)

(i) Proper storage of produce

(ii) Practising of crop rotation

(iii) Spraying with insecticides

(iv) Growing of resistance varieties

(v) Proper drying after harvesting

(1d)

A: Epigeal

B: Hypogeal

(1ei)

(1eii)

TABULATE:

TEST: C + iodine solution

OBSERVATION: A blue-black colour is observed

INFERENCE: Starch is present

 (2ai)

(2ai)

D – Terrestrial (Termitarium)

E – Arboreal (Hive)

(2aii)

TABULATE:

Specimen D:

(i) Absence of stinger

(ii) Strong mandible for biting.

(iii) Absence of eyes

(iv) Absence of ocelli

(v) Absence of wings.

Specimen E

(i) Presence of stringer

(ii) Mandible is moderate.

(iii) Presence of eyes

(iv) Presence of ocelli

(v) Presence of wings.

(2aiii)

Both specimen D and E are social insects

(2bi)

(PICK ANY TWO)

(i) It produces honey which serves as food

(ii) Honey being a product of bee, serves a great medicinal purpose

(iii) It helps to pollinate flower.

(2ciii)

(i) Incisors – Grasping and pulling food into the mouth.

(ii) Premolars- Chewing food

(iii) Molar – Grinding up food

(2d)

Heterotrophic (Herbivorous)

(2e)

(i) Presence of incisor for cutting leaves.

(ii) Presence of diastema which afford the chewing space.

(iii) Presence of sharp enamel ridges grind food as molar slide over each other.

(2e)

(i) Calcium

(iii) Phosphorus

—————————————————————————–

Note: The answers below are for 2020.

(1ai) (2020 Answers)

TABULATE

– TEST: Specimen B + 2drops of iodine solution

– OBSERVATION: No precipitate is found (No reaction is occurring)

INFERENCE: It indicates specimen B contains no starch content

(1aii)
TABULATE

– TEST: Specimen B + 2ml of NaOH(aq) + 3 drops of CuSO4 + shake

– OBSERVATION: The mixture will turn to purple or violet colour

– INFERENCE: Protein is present

(1b)
(i) Test for starch
(ii) Test for protein (Biurets test)

(1c)
– Additional income is obtained through quality mushrooms
– They contain vitamins and proteins and Laos acts as antioxidants supporting the immune system

(1di)
Fungi

(1dii)
– Eukaryotic organism
– Absence of chlorophyll
– Cell walls made of chitin instead of cellulose

(1diii)
– Molds
– Mildews
– Smuts
– Rusts
– Yeast

(1ei)
Mullosca

(1eii)
– Presence of tentacles
– Possession of soft and unsegmented bodies
– Body is covered by a mantle and she’ll
– They are bilaterally symmetrical
– They are triploblastic with three layers

(1fi)
– Specimen C (mushrooms) are decomposers breaking down surface waste releasing nitrogen back into the soil in form of ammonium nitrate, a nutrient essential for plant survival

(1fii)
Saprophytic mode of nutrition

====================================

(2a)
E: Succulent Fruit
F: Berry/Flesh Fruit
H: Legume/Pod

(2b)
E: Parietal Plancentation
F: Axile Plancentation

(2c)
E: Human
F: Animal
H: Explosive Mechanism

(2di)
Specimen E attract birds, squirrels, and other small mammals. Consumption of the fruit will lead to dispersal of the seeds in feces (by human)

(2dii)
(i)Vitamin C
(ii)Magnesium

(2ei)
Green

(2eii)
It signifies that they are still young

(2fi)
Marginal placentation

(2fii)

=====================

(4a)
TABULATE
– Specimen P-
– Test: 2 drops of specimen P in water
– Observation time(seconds): 3-4 seconds before it dissolves
– Medium of spread: Water
– Sense organ: Eye

-Specimen Q-
– Test: Teaspoon of specimen Q + water
– Observation time(seconds): Dissolves within 65 seconds
– Medium of spread: Water
– Sense organ: Eye

-Specimen R-
– Test: Cut section of specimen R
– Observation time(seconds): 2 seconds or almost immediately
– Medium of spread: Air
– Sense organ: Nose

(4b)
Osmosis

4c)
(i)
– Increase in temperature
– Difference in concentration
(ii)
– Molecular size
– Increase in temperature
(iii)
– Increase in temperature
– Difference in concentration

(4di)

(4dii)
It is Whorl

(4diii)
– Loop
– Whorl
– Arch/Compound

(4div)
– Crime detections
– Identification of individuals
– Genetic variation in man

(4dv)
Discontinuous variation

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If you have any questions about the WAEC Biology Practical, kindly let us know in the comment box.

Last Updated on June 17, 2022 by Admin

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