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(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.

(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

Today’s WAEC Biology Answers: Loading…
(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
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(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)
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(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
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(3a)
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(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.

(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.

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QUESTION 2

(2aix)
-precautions-
-I ensured that all apparatus are in straight line
-I avoided error due to parallax when reading the metre rule
-I avoided zero error on the metre rule

The characteristics of image formed are:
-It is virtual
-It is enlarged and magnified ie twice or two times as big as the object m=2

(2bi)
u=10cm
f=15cm
Using 1/v+1/u=1/f
1/f-1/u=1/v
1/v =1/15-1/10
1/v =(2-3)/30
1/v=-1/30
v=-30cm

(2bii)
The concave mirror mounted in its holder is moved to and fro in front of the screen until a sharp image of the cross wire of the ray box is formed on the screen adjacent of the object.The distance between the mirror and the screen was measured as 30cm since the radius of curvature r=2fo then half is distance

(2bi)
The characteristics of imaged formed are :
i)It is virtual
ii) It is enlarged or magnified i.e. twice or two times bigger as the object(m=2)
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