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Biology Waec Answers 2022

Biology Waec Answers 2022

Here we will be posting all biology Waec answers 2022.

(4c)

1.Climate Imbalance and Climate Change. 2.Deforestation also affects the climate in many ways. …

Increase in Global Warming. …

3.Increase in Greenhouse 4.Gas Emissions. …

Soil Erosion. …

Floods. …

5.Wildlife Extinction & Habitat Loss. …

6.Acidic Oceans. …

choose only 4

(2c)

Milk teeth: is a temporary tooth of a young mammal especially one of the human dentition including four incisors, two canines, and four molars in each jaw which fall out during childhood and are replaced by the permanent teeth.

1a. Head movement in any direction affect the fluid/endolymph, In the semi-circular canals, Which are at right angles to each other, The movement forces the sensory/hair cells in the ampulla to set up the impulses, The brain interprets the impulses and relays the impulses to the body muscles for balancing.

(4ai)

Conservation laws are fundamental to our understanding of the physical world, in that they describe which processes can or cannot occur in nature. For example, the conservation law of energy states that the total quantity of energy in an isolated system does not change, though it may change form.

(4d)

Blood Transfusion

A procedure in which whole blood or parts of blood are put into a patient’s bloodstream through a vein. The blood may be donated by another person or it may have been taken from the patient and stored until needed. Also called transfusion. A patient is given blood through an intravenous (IV) catheter in the arm. The blood may be donated by another person, or it may have been taken from the patient and stored until needed.

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3ai) Ecological niche is a term for the position of a species within an ecosystem, describing both the range of conditions necessary for persistence of the species, and its ecological role in the ecosystem.

3aii) provide fruit,

firewood,

poles,

organic matter for soil amendment,

living fence post,

shade,

soil conservation

cattle feed

(1ai)

A cell is the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell.

(1c)

1.Nucleus

2Ribosomes.

3.Endoplasmic reticulum. …

4.Golgi apparatus. …

5Chloroplasts. …

6.Mitochondria.

(1c)

(1) nucleolus

(2) nucleus

(3) ribosome

(4) vesicle

(5) rough endoplasmic reticulum

(6) Golgi apparatus

Biology

In biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body.

1aii) Schwann, Schleiden, and Virchow.(they partook in cell dicovery

1bii) mitochondri

1bii

Mitochondria undergo fragmentation during mitosis and are well distributed throughout the cell soma due to their interactions with the ER and cytoskeleton. As a result, cytokinesis can result in the partitioning of roughly equal amounts of mitochondria to daughter cell

1c)mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisome

(2b

difference between dentition of Herbivores and Carnivores

a) Inciso

Herbivores: The incisors of herbivores are sharp and are used mainly to cut, gnaw and b

Carnivores: The incisors of carnivores are pointed teeth and are used to catch pr

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b) Molars and Premol

Herbivores: Molars and premolars of herbivores have flat grinding surfaces, and they grow continuously throughout their lifetim

Carnivores: Premolars and molars of carnivores are flattened with uneven edges and are used to shear the flesh of prey into smaller pieces. They do not grow continuously throughout lif

C) Canin

Herbivores: Ruminants have canines that are similar to incisors. Gnawing herbivores do not have canine

Carnivores: Canines of carnivores are long, pointed canines are used to catch, kill their prey and tear the flesh of pre

*NUMBER (2b

Difference between dentition of Herbivores and Carnivore

a) *INCISOR

*Herbivores:* The incisors of herbivores are sharp and are used mainly to cut, gnaw and bi

*Carnivores:* The incisors of carnivores are pointed teeth and are used to catch pr

b) *MOLARS AND PREMOLA

*Herbivores:* Molars and premolars of herbivores have flat grinding surfaces, and they grow continuously throughout their lifetim

*Carnivores:* Premolars and molars of carnivores are flattened with uneven edges and are used to shear the flesh of prey into smaller pieces. They do not grow continuously throughout lif

c) *CANINE

*Herbivores:* Ruminants have canines that are similar to incisors. Gnawing herbivores do not have canine

*Carnivores:* Canines of carnivores are long, pointed canines are used to catch, kill their prey and tear the flesh of pre (2a[TABULATE

(i) – ELEMEN

Hydrogen

-MACROELEMEN

Tick ✔️

(ii) – ELEME

Copper

-MICROELEMEN

Tick ✔️

(iii) – ELEME

Magnesium

-MACROELEMEN

Tick ✔️

(iv) – ELEME

Zin

-MICROELEMEN

Tick ✔️

(v) – ELEME

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Phosphorus

-MACROELEMEN

Tick ✔️

(vi) – ELEME

Maganes

-MACROELEMEN

Tick ✔️

(vii) – ELEME

Boro

-MICROELEMEN

Tick ✔️

(viii) – ELEME

Nitrogen

MACROELEMEN

Tick ✔️

(ix) – ELEMENT

Carbo

-MACROELEMEN

Tick ✔️

(x) ELEM

Oxygen

-MACROELEMEN

Tick ✔️

[TABULATE

-HERBIVOR

(i) They are animals that consume only plant and their product

(ii) They have very small mouth opening and consume food from their mout

(iii) They have broad, flat and short, teeth to grind and chew plant leaves, grains, and seeds

-CARNIVOR

(i) They are animals that consume the flesh of other animal

(ii) They have large mouth opening and use their teeth for tearing the flesh apar

(iii) They posses long, sharp, and curved incisors and canines to tear flesh

(2bi

[TABULATE

-HUMA

(i) Humans are homo sapien

(ii) Humans are omnivore

(iii) Humans have a complex nervous system

(iv) Humans walk upright on two leg

-GOA

(i) Goats belong to the specie of capra hircu

(ii) Goats are herbivore

(iii) Goats have a small bria

(iv) Goats walk on four leg

(2

Milk teeth are sets of early, temporary teeth in children or young mammals which fall out as the permanent teeth emerge.c)snssT-s ssN-]i).tsE-.hsE-]2b)T-nENTT-nNT-T- NT-T-nNT-T-eNT-T- NT-T-cNT-T- NT-T-rNT-T-nT-])y.s.S*e.e.RS*eyteS*s )**y.s.ese.e.arseyters )s.si)on) 1a

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