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WAEC 2022 BIOLOGY QUESTIONS AND Answers

BIOLOGY QUESTIONS AND Answers

10th JUNE 2022
BIOLOGY

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BIOLOGY OBJ:
1-10: DCADABCADB
11-20: ABDBABDAAA
21-30: ACBABBCBCB
31-40: ABDDDBDACA
41-50: ACCADCDBBA

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SECTION A ANSWER ONLY TWO(2)

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SECTION B ANSWER ONLY ONE(1)

(1ai)
A cell can be defined as the basic structural and functional unit of life. All living organism are made up of cells

(1aii)
(i) Robert Hooke
(ii) Felix Dujardin
(iii) Mathias Schleiden

(1bi)



(1bii)
Red blood cell

(1biii)
It does not replicate itself but rather die off

(1c)
(i) Nucleus
(ii) Cell membrane
(iii) Cytoplasm
(iv) Chloroplast
(v) Mitochondrion
(vi) Golgi body
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(2a)



(2bi)
TABULATE
=HERBIVORE=
(i) Absence of canine
(ii) Presence of diastema
(iii) Weak molar

=CARNIVORE=
(i) Presence of canine
(ii) Absence of diastema
(iii) Strong molar

(2bii)
TABULATE
=HUMAN=
(i) Absence of diastema
(ii) Presence of canine
(iii) Presence of upper incisors
(iv) Presence of upper premolar

=GOAT=
(i) Presence of diastema
(ii) Absence of canine
(iii) Absence of upper incisors
(iv) Absence of upper premolar

(2c)
Milk teeth are the first set of teeth that grows in an infant when they want to start feeding on solid food. It starts to grow 6months after birth. There 20 milk teeth
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(4ai)
Conservation law It states that the amount of the conserved quantity at a point or within a volume can only change by the amount of the quantity which flows in or out of the volume.

(4aii)
(i)Conservation of mass and energy
(ii)Conservation of linear momentum, conservation of angular momentum
(iii)Conservation of electric charge

(4bi)
(i)Lax and broken regulation systems
(ii)Highly-priced and valued animal parts, products, and pets

(4bii)
(i) Elephants
(ii) Rhinos
(iii) Tigers
(iv) Gorillas
(v) Sea turtles

(4c)
(i) Loss of biodiversity, migration of wildlife
(ii) Exological imbalance
(iii) Soil erosion
(iv) Disruption in hydrological cycle of water catchment area

(4di)
A blood transfusion is a routine medical procedure in which donated blood is provided to you through a narrow tube placed within a vein in your arm.

(4dii)
An antigen is any substance to which the immune system can respond. For example, components of the bacterial cell wall can trigger severe and immediate attacks by neutrophils

(4ai)
Conservation law It states that the amount of the conserved quantity at a point or within a volume can only change by the amount of the quantity which flows in or out of the volume.

(4aii)
(i)Conservation of mass and energy
(ii)Conservation of linear momentum, conservation of angular momentum
(iii)Conservation of electric charge

(4bi)
(i)Lax and broken regulation systems 
(ii)Highly-priced and valued animal parts, products, and pets

(4bii)
(i) Elephants 
(ii) Rhinos 
(iii) Tigers 
(iv) Gorillas 
(v) Sea turtles

(4c)
(i) Loss of biodiversity, migration of wildlife
(ii) Exological imbalance
(iii)  Soil erosion
(iv) Disruption in hydrological cycle of water catchment area

(4di)
A blood transfusion is a routine medical procedure in which donated blood is provided to you through a narrow tube placed within a vein in your arm. 

(4dii)
An antigen is any substance to which the immune system can respond. For example, components of the bacterial cell wall can trigger severe and immediate attacks by neutrophils


.( 5 a )
TABULATE
= EARTHWORM=
( i) Straight
( ii) Simple
( iii ) It feeds on fluid
= COCKROACH =
( i) Curve
( ii) More enveloped
( iii ) It feeds on both fluid and solid
( 5 aii)
( i) Possession of crop
( ii) Possession of gizzard
( iii )Possession of pharynx
( 5 b)
( i) Water cycle
( ii) - Plant contribute through transpiration
- Animals contribute through respiration
- Animals contribute through perspiration
( iii )
- X : Condensation
- Y : Transpiration
- Z : Evaporation
( 5 c )
TABULATE
= ORGAN =
( i) Kidney
( ii) Skin
= DISEASES =
( i) Kidney stones , diuresis and oedema
( ii) Eczema, acne, vitiligo
( 5 di )
This is a process whereby heterotrophic organisms
utilize the remains of one living tissue as a source of
nutrition
( 5 dii )
( i) Fungi
( ii) Bacteria
( 5 diii )
Temperature
( 5 div )
Carbon cycle
( 5 e )
They exhibit heterotrophic nutrition known as
carnivorous or insectivorous feeding. They have
attractive colours that attracts insects to them . Once
the insect lands in their spine , they are killed and
digested



GOOD LUCK











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