2024 WAEC BIOLOGY: 2024 WAEC GCE 2nd SERIES BIOLOGY ANSWERS (7007)

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BIOLOGY PRACTICAL

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

(4ai)
Tree

(4aii)
(i) temperature
(ii)rain fall
(iii) sunlight
(iv) topography
(v)wind

(4bi)
(i)it reduce fertility of the farmland
(ii)it affect the topography of the farmland
(iii)it may cause erosion
(iv)it affect Agricultural activities

(4bii)
(i)It causes imbalance
(ii)It affect the survival of organisms
(iii)It may lead to flood
(iv)It affect the distribution of gases

(4c)
(i)by issuing license
(ii)by stopping unnecessary exploration
(iii) government should promote a law that will reduce entrance into the forest

(iv)by encouraging afforestation

(4di)
(i)Y
(ii)Y
(iii)X
(iv)X

(4dii)
This is because they won't be easily identified on those barks.

(4dii)
Adaptation

(4ei)
According to the theory of natural Section S will be able to live successfully on the bark due to the possession of some characteristics

(4eii)
Flycatchers

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

(1a)
(i)Nutrition
(ii)Movement

(1aii)
(i)Possession of short break for pecking

(ii)Possession of long break for piercing and sucking

(iii)Possession of short beak for pecking

(iv)Possession of long beak for piercing and sucking

(v)Possession of sharp claws for scratching the soil

(vi)Possession of web foot for swimming

(vii)Possession of hind limb for locomotion

(viii)Possession of feet for standing on water

(1b)
(i)Terrestrial habitat
(ii)Aquatic habitat
(iii)Terrestrial habitat
(iv)Aquatic habitat

(1c)
(i)parrot
(ii) domestic fowl
(iii) duck

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

(2a)
(I) Elephant
(II) Zebra
(III) Rhinoceros
(IV) Crocodile
(V) Lion
(2b)
wildlife

(2c)
Endangered species

(2d)
(i)By making homes wildlife friendly
(ii)by cultivating native plants to provide food and shelter for them
(iii)by avoiding deforestation
(iv)by encouraging afforestation

(2e)
(i) deforestation
(ii)bush burning
(iii) hunting
(iv) overgrazing

(2f)
(i)they generate income when conserved
(ii)they bring about tourist attraction
(iii)they create employment Opportunity

(2g)
(i) trunck
(ii) head
(iii)Hind limb
(iv) body surface
(v)head

(4ai)
Tree

(4aii)
(i) temperature
(ii)rain fall
(iii) sunlight
(iv) topography
(v)wind

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

BIOLOGY OBJECTIVE

1ADADBADDAB
11CCCABCDAAD
21AACDAADBAA
31CDACBCBDCB
41BDBCBBDDCB

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

(2a)
Carbon(iv)oxide + water --> Glucose + Oxygen

(2b)
(i)6
(ii)6
(iii)1
(iv)6

(2c)
(i)Plants
(ii)Chloroplast

(2d)
- Green plants use this process to make food from sunlight, Carbon(iv)oxide and Water the atmosphere.
- It is their primary source of food

(2e)
(i)Sunlight - sunlight induces the first step in this process
(ii)Chlorophyll - it is responsible for giving the plant its green colour

(2f)
- Autotrophic mode of nutrition
- Heterotrophic mode of nutrition
- Holozoic mode of nutrition

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

(3)


 

(3a)
TABULATE

BIOLOGY ASSOCIATION || EXAMPLE
Commensalism - Sharks and remora fish, Tigers and golden jackals

Mutualism - Bees and flowers, humans and bacteria in the gut

Parasitism - Humans and tapeworms, cows and ticks

Neutralism - Rainbow trout, and dandevon cactus and tarantulas

(3b)
Pollution can referred to as the introduction of harmful materials or substances into our environment thereby causing adverse charges.

(3ci)
(i)It contributes to global warming
(ii)It leaves a huge carbon footprints

(3cii)
(i)it also contributes to global climate change
(ii)It emits mercury which is a neurotoxin as well as carbon dioxide

(3ciii)
(i)When it spills in aquatic bodies, it causes loss of aquatic lives
(ii)On land, crude oil spills reduce food productivity

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

(6a)
(i) Dominance refers to the exertion of a major controlling influence of one or more species upon all other species by virtue of their number, size, productivity or related activities.

(ii) Size: Population size is the number of individual organisms in a population.

(iii) Density: This the number of living organisms per unit area or volume.

(6b)
(i) Frog has lungs for breathing but also breathes through its skin.
(ii) They have webbed feet, which help them to swim
(iii) They have long and strong hind limbs, which help them in leaping and catching their prey.

(6c)
(i) This is a mismatched blood transfusion. The blood will agglutinate which will lead to fatality. In such a situation, a reaction known as hemolytic transfusion reaction causes the patient's body to form antibodies that attack the new blood cells.

(ii) The patient' blood is tested and to get a matched to be transfused.

(iii) Discontinuous variation

(iv) To know the patient's rhesus factor and blood group which are parameters necessary for a successful blood transfusion

(6di)
(i) Bacteria
(ii) Plants
(iii) Animals

(6dii)
(i) Nitrosomoners
(ii) Nitrobacta
(iii) Fungi

(6e)
(i) Cook the food well
(ii) Always cover the food
(iii) Ensure the environment is always clean

(6a,b,c,d)


(6e)

 

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