2024 WAEC GCE FIRST SERIES (JANUARY) BIOLOGY: 2024 WAEC GCE First Series BIOLOGY QUESTIONS AND ANSWERS (3530)

Biology practical

(1ai)

(i) Radicle

(ii) Bridosperm

(iii) Testa 

(iv) Cotyledon

(v) 

(vi) Elalosome 

(1aii)

Bean and pea

(1b)

I - Radicle absorbes water from soil

II - Endosperm support , protect and control embryo growth

III - Controls gemination through dormancy composition

IV - helps supply the nutrition needed to germinate

V -

VI - it aids dispersal of seeds

(1ci)

(a) Starch

(b) Protein

(1di)

(a) Starch:

This add a few drops of iodine solution to the food solutions , the solution turns to dark blue - black

(b) Protein:

This adds bluret reagents to the food , it turns purple from blue

(1ei)

(a) Starch is degraded by the combined actions of sevral hydrolytic enzymes to provide energy for the embryo

(b) Stored protein are degraded by proteases

(1f)

(i) oxygen

(ii) water

(ii) proper temperature

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

(2ai)

A - Tilapia fish

B - Tadpole

(2aii)

(i) Nostril

(ii) Scale

(iii) Dorsal fin

(iv) Lateral lines

(v) Caudal fin

(vi) Tail

(vii) Anal fin

(viii) Pelvic fin

(ix) Pectoral fin

(x) Openculum 

(2bi)

Actinopterygii

(2bii)

(a) Body is covered with scales

(b) Presence of paired fins

(c) Presence of lateral lines

(d) Presence of operculum/gill cover.

(2c) 

[Pick any two]

(i) It has fins that help it swim in water.

(ii) It has gills that help it breath in water.

(iii) It has specialized eyes for viewing objects in water.

(2cii)

(i) The ear pit; enables the tadpole to detect the approach of enemies/food/direction of water current

(ii) Streamlined body; for easy movement in wate

(2di)

(i) Both posses tail

(ii) Both posses head

(2dii)

[Tabulate]

SPECIMEN A

(i) Body is streamlined

(ii) Presence of fins on the tail

(iii) Presence of lateral lines on the body

(iv) presence of scal

SPECIMEN B

(i) Body is not streamlined

(ii) Absence of fins on the tail

(iii) Absence of lateral lines on the body

(iv) Absence of scale

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

Condition Necessary for germination

(i) Sufficient Water.

(ii) Suitable Temperature.

(iii) Adequate Oxygen Supply.

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

BIOLOGY OBJ

01-10: AADBACBBBA

11-20: CBBCCAAAAB

21-30: DCCCCDBBBD

31-40: DCDBCABDCC

41-50: DBCADBBBBB

COMPLETED.

(6a)

Singapore is a small country which is speculated to be not so great as other big countries

(6b)

When they are properly managed and being processed into finished goods, they can generate lots of income for the citizens.

(6c)

The writer considers knowledge as the most vital consideration for a nation to be great

(6d)

Good governance helps in provision of tranquil environment that enhances development of a nation.

(6e)

[Pick any Two]

(i) Presence of natural resources

(ii) Existence of finished products from the natural resources

(iii) Good governance

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

(4bi)

(a)Organic evolution is a sum total of adaptive changes from pre-existing or old forms which have taken place over a long time and which result in diversity of form, structure, and functions among organisms.

(4bii)

(i) Charles Darwin

(ii) Carolus Linnaeus

(iii) Jean-Baptiste Lamarck

(4ci)

(i)They live in colonies or communities.

(ii)They undergo division of labour.

(4cii)

Loading

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

(5a) 

a) Euphotic Zone. (Sunlight Zone). 

b) Dysphotic Zone (Twilight Zone).

c) Aphotic Zone.

(5bi) 

Population is defined as a group of individuals of the same species living and interbreeding within a given area.

(5b)

i) Pooter

ii) Sweep net

(5c)

i) Freezing.

ii) Canning.

iii) Smoking.

iv) Frying. 

(5di)

Tropism is a growth toward or away from a stimulus. Common stimuli that influence plant growth include light, gravity, water, and touch. Common tropic responses in plants include phototropism, gravitropism, thigmotropism, hydrotropism, thermotropism, and chemotropism.

5dii) 

i) Nastic response

ii) Tactic response

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

(3a)

Loading

(3b)

[Pick any four]

(i) Planting grasses/legumes

(ii) Crops must be planted on ridges across slopes

(iii) Practicing shifting cultivation/bush fallowing/crop rotation

(iv) Avoiding/preventing bush burning

(v) Addition of manure/fertilizer to the top soil

(vi) Spreading a layer of vegetable material on cultivated farmland/mulching

(3c)

(i) Soil

(ii) Water

(iii) Forest

(iv) Wild life

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

(1)

(i). Transpiration is the evaporation of water from plants occurring at the leaves while their stomata are open for the passage of CO2 and O2 during photosynthesis.

(ii) 

Temperature 

Acidity 

Salt concentration and amount of moisture

(iii) 

Stomata allow a plant to take in carbon dioxide, which is needed for photosynthesis. They also help to reduce water loss by closing when conditions are hot or dry. Stomata look like tiny mouths which open and close as they assist in transpiration

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

(2a)

(i) Ingestion; taking in pieces of solid food into the mouth

(ii) Digestion: breaking down of large food particles by mechanical/chewing; enzymatic activites/chemical means into smaller particles/soluble that the body can absorb.

(iii) Absorption: taking up the soluble products of digestion into the blood;

(iv) Assimilation: using/utilization of the absorbed food materials by the body cells/tissues

(iv) Egestion: elimination of the undigested food materials through the anus.

(2b)

(i) Secretion: Production and release of substances; useful to the body; by specialized glands of living organism.

(ii) Elimination: Removal of undigested food; from the body of living organisms.

(iii) Excretion: Removal of waste products of metabolism; from the cells/tissues of an organism; may be toxic if retained in the body.

(2c)

Draw the diagram

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

(bii)

Elimination

It is the removal of indigestible wastes through the anus, in the form of feces.

(biii)

Excretion: is a process, act or function of discharging or ejecting waste product of metabolism, especially from the system of an organism.

Conversely, egestion is the removal of undigested wastes by discharging or expulsing them from the digestive tract via the anus.

Five stages of holozoic nutrition in human

I) Ingestion.

II) Digestion.

III) Absorption.

IV) Assimilation.

V) Egestion.

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