2023 WAEC Alternative to Practical Biology Expo Questions & Answers

Waec Alternative practical biology Expo 2023 – May/June

2023 Waec biology practicals Expo runs Available >

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HERE IS LAST YEAR ANSWERS ON WAEC BIOLOGY PRACTICAL FOR YOUR OWN STUDY.

(1ai)
A – Housefly
B – Spider

(1aii)
A – Insecta
B – Arachnida

(1aiii)
A:
(i) It has three pairs of legs
(ii) Possession of three body segment

B:
(i) It has four pairs of legs
(ii) Possession of two body segment

(1aiv)
I – Antennae
II – Eye
III – Hind leg
IV – Leg
V – Cephalothorax
VI – Abdomen

(1av)
I – For sensitivity
II – For sight
III – For movement

(1avi)
Tabulate

A:
(i) Possession of wings
(ii) Possession of compound eyes

B:
(i) Absence of wings
(ii) Possession of simple eyes

(1avii)
(i) Head
(ii) Thorax
(iii) Abdomen

(1aviii)
(i) Wing
(ii) Mouthpart

(1bi)
Oxygen

(1bii)
(i) The experiment must be done during the day.
(ii) There must be presence of water.

(1bii)
Experiment to show that oxygen is liberated during photosynthesis.

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(2ai)
D – Maize seedling plant
E – Monocot root

(2aii)
I – Tassel
II – Flag leaf
III – Leaf
IV – Styles
V – Female inflorescence

(2aiii)
Tassel, female inflorescence, ovary

(2bi)
VII

(2bii)
Phloem

(2biii)
VI

(2ci)
VII
(i) Absorption of water and nutrient
(ii) It provides support

VIII
(i) Maximise the roots water
(ii) Absorption of mineral

(2cii)
(i) They possesses long stigma
(ii) Possession of feathery flowers
(iii) Possession if one reproductive organ

(2di)
F – Webbed feet
G – Non webbed feet

(2dii)
I – Hind toe
II – Web foot
III – Claw

(2diii)
It enables them to float on water

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(3ai)
H – Microscope
I – Filoplume feather

(3aii)
I – Lens
II – Coarse focusing mechanism
III – Objective lens
IV – Arm

(3aiii)
1 – Paramecium
2 – Bacteria

(3aiv)
(1) Wet it dirty slides should never be out on the stage
(2) Never use a dry cloth or paper towel to wipe optical surface or lens

(3av)
(1) Always use two hands when using the microscope
(2) Make sure the microscope is not plugged in before moving it
(3) When the microscope is not in use cover it with a dust cover or store in a microscopic case

(3bi)
VIII – Outer web or vane
IX – Barbs
X – Rachis it shaft

(3bii)
Pigeons

(3biii)
(i) It is used for flight
(ii) To consume body heat
(iii) It is also used for social display

(3ci)
To avoid the presence of sunlight

(3cii)
It helps in absorption of carbon in the leaves

(3ciii)
(1)
It will remain yellowish in colour indicating the absence of starch

(2)
It will change blue black indicating the presence of starch

(3civ)
Starch present

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