2011 JAMB Biology Past Questions & Answers

Question 1

The wings of a bat and those of a bird are examples of

Accepted Answer

A. convergent evolution

Answer

B. continuous variation

Answer

C. coevolution

Answer

D. divergent evolution

Question 2

Which of the following organs regulates the levels of water, salts , hydrogen ions and urea in the mammalian blood?

Accepted Answer

B. Kidney

Answer

A. Liver

Answer

C. Bladder

Answer

D. Colon

Question 3

An example of a filter -feeding animal is

Accepted Answer

C. whale

Answer

A. shark

Answer

B. butterfly

Answer

D. mosquito

Question 4

The bright coloured eye spots on the wings of moth are an example of

Accepted Answer

D. mimicry

Answer

A. warning colouration

Answer

B. disruptive colouration

Answer

C. crypsis

Question 5

Which of the following can cause shrinkage of living cells?

Accepted Answer

D. Hypertonic solution

Answer

A. Hypotonic solution

Answer

B. Isotonic solution

Answer

C. Deionized water

Question 6

The crossing of individuals of the same species with different genetic characters is

Accepted Answer

A. cross breeding

Answer

B. polygenic inheritance

Answer

C. non-disjunction

Answer

D. inbreeding

Question 7

The adult form of iii is a vector of

Accepted Answer

A. sleeping sickness

Answer

B. river blindness

Answer

C. cholera

Answer

D. elephantiasis

Question 8

The sequence of the one-way gaseous exchange mechanism in a fish is

Accepted Answer

D. mouth → gills → operculum

Answer

A. operculum → gills → mouth

Answer

B. gills → operculum → mouth

Answer

C. mouth → operculum → gils

Question 9

Which of the following instruments is used to measure relative humidity?

Accepted Answer

C. Hygrometer

Answer

A. Hydrometer

Answer

B. Thermometer

Answer

D. Anemometer

Question 10

The ability of living organism to detect and respond to changes in the environment is referred to as

Accepted Answer

B. irritability

Answer

A. locomotion

Answer

C. growth

Answer

D. taxis

Question 11

During blood transfusion, agglutination may occur as a result of the reaction between

Accepted Answer

D. similar antigens and antibodies

Answer

A. contrasting antigens and antibodies

Answer

B. two different antigens

Answer

C. two different antibodies

Question 12

The interaction of a community of organisms with its abiotic environment constitutes

Accepted Answer

C. an ecosystem

Answer

A. niche

Answer

B. a food chain

Answer

D. a mirohabitat

Question 13

The inheritable characters that are determined by a gene located on the X-chromosome is

Accepted Answer

B. sex-linked

Answer

A. recessive

Answer

C. homozygous

Answer

D. dominant

Question 14

Millet , sorghum, maize and onions are common crops growth in Nigeria in the

Accepted Answer

B. sudan savanna

Answer

A. tropical rainforests

Answer

C. montane forests

Answer

D. sahel savanna

Question 15

The vector of the malaria parasite is

Accepted Answer

B. female Anopheles mosquito

Answer

A. female Aedes mosquito

Answer

C. male Culex mosquito

Answer

D. female Culex mosquito

Question 16

Lack of space in a population could lead to an increase in

Accepted Answer

C. disease rate

Answer

A. water scarcity

Answer

B. birth rate

Answer

D. dought

Question 17

The path followed by air as it passes through the lungs in mammals is

Accepted Answer

A. trachea → bronchi → bronchioles → alveoli

Answer

B. bronchi → trachea → alveoli → bronchioles

Answer

C. trachea → bronchioles → alveoli

Answer

D. bronchioles → alveoli → bronchi →trachea

Question 18

The part of the mammalian ear responsible for the maintenance of balance is the

Accepted Answer

D. vestibular system

Answer

A. cochlea

Answer

B. pinna

Answer

C. perilymph

Question 19

In which of the following biomes is the south western part of Nigeria located?

Accepted Answer

B. Tropical rainforest

Answer

A. Temperate forest

Answer

C. Tropical woodland

Answer

D. Desert

Question 20

The number of alleles controlling blood groups in humans

Accepted Answer

A. 3

Answer

B. 4

Answer

C. 5

Answer

D. 2

Question 21

The vascular tissues in higher plants are responsible for

Accepted Answer

A. the movement of food and water

Answer

B. suction pressure

Answer

C. transpiration pull

Answer

D. the transport of gases and water

Question 22

Which of the following is true of leucocytes?

Accepted Answer

C. they are large and nucleated

Answer

A. they are respiratory pigments

Answer

B. they are most numerous and ramify all cells

Answer

D. they are involved in blood clotting

Question 23

In nature, plants and animals are perpetually engaged in mutualism because

Accepted Answer

C. they utilize respiratory wastes of each other

Answer

A. they are rivals

Answer

B. all animals rely on food produced by plants

Answer

D. they are neighbours

Question 24

Use the following information to answer the question below. I. Test tube containing cane sugar and water . ll. Test tube containing cane sugar and diluted acid. III. Test tube containing cane sugar and its degrading enzyme . The enzyme involved in the hydrolysis is

A.rennin
B.erepsin
C.sucrase
D.maltase

Show answer

Answer: C. sucrase

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Accepted Answer

B. ll and lll only

Answer

A. l and ll only

Answer

C. l only

Answer

D. l, ll and lll

Question 25

In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained Weight of the evaporating basin alone = 80.5g Weight of basin and soil = 101.5g Weight after drying the soil in the oven = 99.0g Weight of basin and roasted soil = 95.5g The percentage of humus in the soil sample is

A.16.7%
B.17.6%
C.26.7%
D.16.2%

Show answer

Answer: A. 16.7%

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Accepted Answer

A. 16.7%

Answer

B. 17.6%

Answer

C. 26.7%

Answer

D. 16.2%

Question 26

I. Parasitism → Sundew. ll. Autotrophism →Amoeba. III. Saprophytism → Alga. IV Heterotrophism → Agama. Which of the above modes of nutrition is correctly matched with the organism that exhibits it?

Accepted Answer

C. lV

Answer

A. ll

Answer

B. lll

Answer

D. l

Question 27

An economic importance of the organism represented by IV is that

Accepted Answer

D. it helps in the control of mosquito larvae

Answer

A. it transmit water borne disease to humans

Answer

B. it is destructive to farm crops

Answer

C. its faeces pollutes drinkng water

Question 28

Habitats are generally classified into

Accepted Answer

B. aquatic and terrestrial

Answer

A. biotic and abiotic

Answer

C. aboreal and marine biomes

Answer

D. microhabitats and macrohabitats

Question 29

Seed plants are divided into

Accepted Answer

B. angiosperms and gymonsperms

Answer

A. trachephytes and ferns

Answer

C. monocotyledons and dicotyledons

Answer

D. thallophytes and bryophytes

Question 30

An example of an endospermous seed is

Accepted Answer

A. maize gain

Answer

B. cashew nut

Answer

C. cotton seed

Answer

D. been seed

Question 31

If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of

Accepted Answer

B. incomplete dominance

Answer

A. codominance

Answer

C. mutation

Answer

D. linkage

Question 32

Drancunculiasis can be contacted through

Accepted Answer

B. drinking contaminated water

Answer

A. eating contaminated food

Answer

C. bathing in contaminated water

Answer

D. bites of blackfly

Question 33

Which of the following is a feature of the population pyramid of a developing country?

Accepted Answer

D. short lifespan

Answer

A. long lifespan

Answer

B. low birth rate

Answer

C. low death rate

Question 34

The movement response of a cockroach away from a light source can be described as

Accepted Answer

B. negative phototaxism

Answer

A. positive phototaxism

Answer

C. negative phototropism

Answer

D. positive phototropism

Question 35

Use the following information to answer the question below. I. Test tube containing cane sugar and water . ll. Test tube containing cane sugar and diluted acid. III. Test tube containing cane sugar and its degrading enzyme . The enzyme involved in the hydrolysis is

Accepted Answer

C. sucrase

Answer

A. rennin

Answer

B. erepsin

Answer

D. maltase

Question 36

The function of the red head in male Agama lizards is to

Accepted Answer

C. attract female lizards for mating purposes

Answer

A. conceal and camouflage the animal from predators

Answer

B. scare other males from the territory

Answer

D. warm predators of the distastefulness of the animal

Question 37

In which of the following groups of vertebrates is parental care mostly exhibited ?

Accepted Answer

D. Mammalia

Answer

A. Reptilia

Answer

B. Amphibia

Answer

C. Aves

Question 38

Which of the following groups of environmental factors are density-dependent?

Accepted Answer

C. Food predation, disease and accumulation of metabolites

Answer

A. Food, salinity, accumulation of matabolites and light

Answer

B. Temperature, salinity predation and disease

Answer

D. Temperature food disease and light

Question 39

Exo-erythrocytic phase of the life cycle of malaria parasite occurs in the

Accepted Answer

A. liver of humans

Answer

B. reticuloendothelial cells of humans

Answer

C. Malphigian tubules of mosquito

Answer

D. brain of humans

Question 40

The adaptive importance of nuptial flight from termite colonies is to

Accepted Answer

A. disperse the reproductives in order to establish new colonies

Answer

B. provide abundant food for birds and other animals during the early rains

Answer

C. ensure cross-breeding between members of one colony and another

Answer

D. expel the reproductives so as to provide enogh food for other members

Question 41

The type of asexual reproduction that is common to both Paramecium and protists is

Accepted Answer

D. fission

Answer

A. budding

Answer

B. sporulation

Answer

C. fragmentation

Question 42

The fallacy in Lamarck's evolutionary theory was the assumption that

Accepted Answer

B. acquried traits are heritable

Answer

A. traits are acquired through disuse of body parts

Answer

C. acquired traits are seldom formed

Answer

D. traits are acquired through the use of body parts

Question 43

The conversion of a nutrient into a molecule in the body of a consumer is referred to as

Accepted Answer

B. assimilation

Answer

A. digestion

Answer

C. absorption

Answer

D. inhibition

Question 44

In mammals, the exchange of nutrients and metabolic products occurs in the

Accepted Answer

D. lymph

Answer

A. lungs

Answer

B. oesophagus

Answer

C. trachea

Question 45

Which of the following theories was NOT considered by Darwin in his evolutionary theory?

Accepted Answer

C. Use and disuse

Answer

A. Variation

Answer

B. Survival of the fittest

Answer

D. Competition

2011 JAMB Biology Past Questions

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