2019 WAEC Biology Practical Question & Answer

BIOLOGY PRACTICAL:

1a)
The branch of biology that involves the use of specimen A, B, C, D, E and F is ecology.

(1b)
A – It is used for measuring temperature or determining the degree of hotness or coldness of an object/organ/organism
B – For measuring the amount/volume of rainfall in an ecosystem
C -To measure the length, height and width of an object/organsim
D – For collecting insects/creeping/crawling animal.
E – For finding wind direction.
F – To estimate the population of plants in an ecosystem.

(1c)
B – The specimen is stationed above ground on an open space. After rainfall, the volume of water found in the glass bottle is measured with a cylinder as the volume of rainfall.

D – The net is skimmed on the water surface so as to collect the desired specimen.

(1d)
DARWING

(1e)
Specimen D
(i) Small aquatic organisms eg Amoeba
(ii) Small insects eg mosquito.

Specimen F
(i) Plants specie in a grassland eg spear grass.
(ii) Animal specie in a grassland he grasshopper.

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(2ai)
Kingdom – Animalia
Class – Aves

(2aii)
The specific location is the wings.

(2aiii)
Fowl

(2b)
In a tabular form
Under Specimen H
-Light brownish in colour
-Obtained from animal.
-The barbs are joined.
-The shaft is made of cuticle.
-It acts as an organ of insertion.
-specimen is soft and fluffy.

Specimen J
-Green in colour.
-Obtained from a plant.
-Each leaf is separate from one another.
-The shaft is made of wood.
-Acts as an organ of photosynthesis.
-Specimen is hard.

(2c)
H – It is used for flying.
J – it is used for photosynthesis.

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(4ai)
Sex of specimen P is Male
(4aii)
The wings of male cockroach are larger than that of the
females and extend beyond the abdomen.
(4bi)
Habitats
P – It can be found in dark place.
Q – It can be found in farm lands.
(4bii)
Adaptation of P
(i) Possession of antenna for detecting food.
(ii) Compound eye for wider view.
(iii) Possession of jointed pair of legs.
Adaptation of Q
(i) Possession of chitinous body cover for protection.
(ii) Presence of wings for flight.
(iii) Mandibular mouth part for chewing.
(4c)
In a tabular form:
Specimen P
Dorso-ventrally flattened to allow passage through
cracks.
Specimen Q
Possession of chitinous body cover for protection.

COMPLETED..

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