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Biology Past Questions

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2,099 questions

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Question 131

waec 2020

Use the list of insects below to answer the question below;

I. Cotton stainer II. Honeybee III. Termite IV. Weevil

Which of the insects destroys grains?

BII

CIII

DIV

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Question 132

waec 2020

Use the list of insects below to answer the question below;

I. Cotton stainer II. Honeybee III. Termite IV. Weevil

The insects whose activities are both beneficial and harmful to humans are;

AI and II

BII and III

CII and IV

DIII and IV

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Question 133

waec 2020

The depletion of the ozone layer will result in the earth surface receiving more

Agamma rays

Binfra-red rays

Cultraviolet rays

DX-rays

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Question 134

waec 2020

The position occupied by an organism in food chain is the

Aenergy level

Bniche

Ctrophic level

Dbiomass

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Question 135

waec 2020

Soil with the finest texture is?

Asilt

Bclay

Csand

Dgravel

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Question 136

waec 2020

The diagram below is an illustration of an ecological instrument. Study it an answer the question below;

The diagram above illustrates an ecological instrument. Study it and answer the question below; A disadvantage... - Myschool

When the instrument is in use, it is usually?

Aplaced slightly above soil level

Bplaced on a table

Csuspended in air

Dsuspended to moving water

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Question 137

waec 2020

The diagram above illustrates an ecological instrument. Study it and answer the question below;

A disadvantage of the abiotic factor measured by the instrument is that it

Ais an agent of pollination

Bis necessary for germination

Cleads to flooding when in excess

Dis used for irrigation

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Question 138

waec 2020

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism	Number in the habitat
	habitat W	habitat Y
Plankton	126	0
Antelope	0	51
Water flea	10	0
Tilapia	23	0
Lion	0	6
Frog	6	0
Grass	0	250

The number of lions and antelops in habitat Y shows that the lion

Ais the prey while the antelope is the predator

Bis the predator while the antelope is the prey

Cand the antelope are preys to each other

Dand the antelopes are predators

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Question 139

waec 2020

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism	Number in the habitat
	habitat W	habitat Y
Plankton	126	0
Antelope	0	51
Water flea	10	0
Tilapia	23	0
Lion	0	6
Frog	6	0
Grass	0	250

Which of the following statements about habitat W is correct? The

Aabsence of lions and antelopes shows that the habitat is terrestrial

Bpresence of Tilapia and planktons shows that the habitat is not aquatic

Ctype of organisms present indicate that habitat is aquatic

Dabsence of grasses indicates that the habitat is terrestrial

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Question 140

waec 2020

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism	Number in the habitat
	habitat W	habitat Y
Plankton	126	0
Antelope	0	51
Water flea	10	0
Tilapia	23	0
Lion	0	6
Frog	6	0
Grass	0	250

What type of habitat is W?

ARainforest

BPond

CDesert

DOcean

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Question 141

waec 2020

The mutualism type of relationship is different from a parasitic relationship because in mutualism

Aboth organisms involved benefit

Bnone of the organisms benefits or harm each other

Cboth organisms harm each other

Donly one of the organisms is harmed

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Question 142

waec 2020

Which of the following statements about a mixture of a protein-digesting enzyme and starch solution would be correct? The protein-digesting enzyme

Ahas no effect on the starch solution

Bleads to the production of amino acids

Cleads to the production of glucose

Ddigest the starch

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Question 143

waec 2020

An example of a trace elements is

Apotassium

Bcalcium

Cmagnesium

Dcopper

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Question 144

waec 2020

The first stable product of photosynthesis is

Astarch

Bfructose

Cglucose

Dsucrose

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Question 145

waec 2020

Oxygen comes out of the stomata during photosynthesis through the process known as

Adiffusion

Btranspiration pull

Cosmosis

Dactive transport

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Question 146

waec 2020

The reagent used in testing for carbon (IV) oxide is

Acopper sulphate solution

Blime water

Chydrochloric acid

Dsodium hydroxide solution

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Question 147

waec 2020

The diagram below is an illustration of a part of a flower. Study it and answer the question below.

The diagram is an illustration of a part of a flower. Study it and answer the... - Myschool

The part labeled II is the

Aunfused stigma

Bfused style

Cfused ovaries

Dunfused anther

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Question 148

waec 2020

The diagram is an illustration of a part of a flower. Study it and answer the question below;

The function of the part labeled I is

Areceiving the pollen grain

Battract pollinators

Cgermination of the pollen grain

Dsite for double fertilization in the plant

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Question 149

waec 2020

What happens when the ciliary muscles of the eye contract? The

Alens become more concave

Blens become more convex

Clens gets a longer focal length

Dsuspensory ligament becomes tight

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Question 150

waec 2020

The part of the central nervous system that controls unconscious actions in humans is the

Acerebellum

Bcerebrum

Cspinal cord

Doptic nerves

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