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Biology Past Questions

Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.

2,099 questions JAMB 2572 WAEC 2099 NECO 351 CUSTOM 10
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Past Questions

2,099 questions
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Question 1 of 20 2,099 total questions
Question 361
waec 2011
A xerophyte conserves water by possession of the following features except
Athick cuticle
Bsunken stomata
Cbroad leaves
Dfleshy stem
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Question 362
waec 2011
The rate of decomposition of organisms is faster in the tropical rain forest than in other biomes because
Aof the relatively constant daylight
Bthere are more plants per square feet
Cof abundance of water
Dof constant cool temperature
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Question 363
waec 2011
Which of the following substances when lost from the body of a mammal will not be returned to the ecosystem?
ASweat
BUrea
CHeat energy
DCarbon dioxide
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Question 364
waec 2011
Ecological investigation in a habitat includes the following procedures except
Achoosing a habitat
Bidentification of specimens
Cdetermining the genetic makeup of specimens
Dmeasuring abiotic and biotic factors
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Question 365
waec 2011

Use the information on capture-recapture method to calculate the total number of organisms in a habitat.
First capture = 200
Second capture = 120
Number of organisms with mark in second capture = 40

The total number of organisms therefore is

A200
B360
C600
D800
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Question 366
waec 2011
The following are abiotic components of an ecosystem except
Atemperature
Boxygen
Cbacteria
Dsoil
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Question 367
waec 2011
Which of the following structures produces the greatest variety of digestive enzymes?
ASalivary glands
BPancreas
CStomach
DColon
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Question 368
waec 2011
The following organisms are producers except
AHibiscus
BMushroom
CCactus
DSpirogyra
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Question 369
waec 2011
Which of the following enzymes is active in the duodenum?
APepsin
BRenin
CTrypsin
DAmylase
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Question 370
waec 2011
A purple colour was obtained when sodium hydroxide solution and a drop of copper sulphate solution were added to a food substance. The food substance is likely to be a
Acarbohydrate
Bfat
Cprotein
Dsugar
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Question 371
waec 2011
The conversion of glucose to starch in the leaf during the day principally
Aenables photosynthesis
Bprevents osmotic problems
Cenables the leaf to store the starch
Denables glucose to be used up
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Question 372
waec 2011
Which of the following groups of substances are not six-carbon compounds?
AGlucose and lactose
BLactose and cellulose
CGlucose, Lactose and Pyruvate
DPyruvate and cellulose
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Question 373
waec 2011
The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to
Aprovide more energy to the roots
Baccumulate more starch in the roots
Ccause the underground roots to develop buds
Dcause the p ant to wither and die
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Question 374
waec 2011
Which of the following statements about photosynthesis is not true?
APlants can photosynthesize without an increase in dry weight
BCarbon dioxide is absorbed by the leaves in bright light
Coxygen is produced during photosynthesis from the breakdown of water
DPhotosynthesis occurs in green plants
View Explanation & Discuss
Question 375
waec 2011

The process whereby electrons are emitted from chlorophyll and returned to it unchanged is known as?

Anon-cyclic phosphorylation
Bphotochemical reaction
Cphotophorylation
Dcyclic photophorylatlion
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Question 376
waec 2011
Kreb’s cycle occurs in the
Amitochondria
Bcytoplasm
Cnucleus
Dribosomes
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Question 377
waec 2011
What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell?
A12
B24
C35
D48
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Question 378
waec 2011
Which of the following methods is appropriate for the cultivation of cassava?
ABudding
BFragmentation
CRoot cutting
DStem cutting
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Question 379
waec 2011
Some animals return to water bodies to reproduce because
Anatural enemies destroy their eggs on land
Bwater nourishes their embryos and their young ones
Cthey are close to their ancestors and imitate them
Dthe temperature on land is not suitable for the development of their embryos
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Question 380
waec 2011
The testes in male mammals descend into the scrotal sac because
Athere is congestion in the lower abdomen
Bthey run the risk of being destroyed
Cthey need special support
Dthey require a relatively low temperature
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