ERN WAEC BIOLOGY QUESTIONS:
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ERN WAEC BIOLOGY ANSWERS:
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(3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally.
(3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
(3bi)
(i)oxygen
(ii)fresh water
(3bii)
(i)oil
(ii)natural gas
(3c)
(i)Regulated and Planned Cutting of Trees.
(ii)Control over Forest Fire.
(iii)Reforestation and Afforestation.
(v)Check over forest clearance for agricultural and habitation Purposes.
(iv)Proper Utilisation of Forest and Forests Products.
(3d)
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(4ai)
Gene is the discrete unit of inheritance which are found in the chromosomes of all cell.
(4aii)
A hybrid is an offspring obtained from the cross-breeding of the species that are not closely related.
(4aiii)
Trait is the characteristic factor of an individual which are hereditary.
(4b)
Draw the diagram
Phenotyoic ratio= 3:1
Genotypic ratio= 1:2:1
(4c)
The four transmittable characters in plants are:
-Height
-Colour
-Shape of fruit
-Size of Leaf
3d)
i)increases soil nutrients
ii)increases soil air
iii)improve soil structure
iv)does not corrupt the soil
(3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally.
(3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
(3bi)
(i)oxygen
(ii)fresh water
(3bii)
(i)oil
(ii)natural gas
(3c)
(i)Regulated and Planned Cutting of Trees.
(ii)Control over Forest Fire.
(iii)Reforestation and Afforestation.
(v)Check over forest clearance for agricultural and habitation Purposes.
(iv)Proper Utilisation of Forest and Forests Products.
(3d)
(4ai)
Gene is the discrete unit of inheritance which are found in the chromosomes of all cell.
(4aii)
A hybrid is an offspring obtained from the cross-breeding of the species that are not closely related.
(4aiii)
Trait is the characteristic factor of an individual which are hereditary.
(4b)
Draw the diagram
Phenotyoic ratio= 3:1
Genotypic ratio= 1:2:1
(4c)
The four transmittable characters in plants are:
-Height
-Colour
-Shape of fruit
-Size of Leaf
(3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally.
(3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
(3bi)
(i)oxygen
(ii)fresh water
(3bii)
(i)oil
(ii)natural gas
(3c)
(i)Regulated and Planned Cutting of Trees.
(ii)Control over Forest Fire.
(iii)Reforestation and Afforestation.
(v)Check over forest clearance for agricultural and habitation Purposes.
(iv)Proper Utilisation of Forest and Forests Products.
(3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally.
(3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
(3bi)
(i)oxygen
(ii)fresh water
(3bii)
(i)oil
(ii)natural gas
(3c)
(i)Regulated and Planned Cutting of Trees.
(ii)Control over Forest Fire.
(iii)Reforestation and Afforestation.
(v)Check over forest clearance for agricultural and habitation Purposes.
(iv)Proper Utilisation of Forest and Forests Products.
(3d)
¶As the soil absorbs manure, nutrients are released. This
enriches the soil, which in turn, helps the plants.
¶It conditions the soil. For instance, mixing
manure with sandy soils helps to retain moisture levels.
¶Adding manure to compacted soil helps loosen the soil.
¶manure reduces runoff
and leaching of nitrates in the soil.
(4ai)
Gene is the discrete unit of inheritance which are found in the chromosomes of all cell.
(4aii)
A hybrid is an offspring obtained from the cross-breeding of the species that are not closely related.
(4aiii)
Trait is the characteristic factor of an individual which are hereditary.
(4b)
Draw the diagram below here.
(4c)
The four transmittable characters in plants are:
-Height
-Colour
-Shape of fruit
-Size of Leaf
*Ghana only*
5a)
*Health is the ability of a biological system to acquire, convert, allocate, distribute and utilize the energy with maximum efficiency.
*Hygiene is a conditions or practices to maintaining health and preventing disease, especially through cleanliness
*Santitaton is a conditions relating to public health, especially the provision of clean drinking water and adequate sewage disposal
5bi)
Bilateral symmetry are
heads or tails, animals and sponge are different *WHILE*
Radical symmetry are snowflakes or a pie, animal and sponge are different
5bii)
For animal with bilateral symmetry, a longitudinal section is parrallel to the anterior posterior axis . Sections through or parallel to either the sagittal or coronal also called frontal plane are longitudinal *WHILE* A tranverse section is perpendicular the anterior posterior axis and is also called a cross section
5e)
*Muscular to pump blood over long distance
*Myogenic cardaic muscles which contract and relax rhythmically without fatigue hence heart continue pumping
*Heart is divided into 4 chambers which are hollow to accommodate more blood Please don't just Read and Go, Kindly Use the Share button Below, Thanks
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