Biology Past Questions

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Past Questions

5,032 questions
Question 1 of 20 5,032 total questions
Question 1621
jamb 2000

Example of water-borne and sex linked diseases are?

Ataeniasis and malaria
Bcholera and gonorrhoea
Ctyphoid and syphilis
Ddracunculiasis and haemophilia
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Question 1622
jamb 2000

In a group of male Agama lizards, the one with the brightest head colour is the

Adominant
Byoungest
Coldest
Dlargest
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Question 1623
jamb 2000

The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain?

Aanimal rather than plant remains
Binvertebrates rather than birds
Cflowering plants rather than mosses
Dreptiles rather than fishes
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Question 1624
jamb 2000

Blood grouping in human beings is derived from combinations of

Atwo different alleles
Bfour different alleles
Cthree different alleles
Dtwo different genes
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Question 1625
jamb 2000

The surest way to combine the best qualities of both parents in the offspring is by

Across-breeding
Binbreeding
Cselective breeding
Dpure breeding
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Question 1626
jamb 2000

The pollutants that contribute to the depletion of the ozone layer in the atmosphere are

Aradioactive materials
Boxides of sulphur
Coxides of carbon
Dchlorofluorocarbons
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Question 1627
jamb 2000

A cross between an albino female and a genetically normal male will result in offspring that are

Aall albino
Ball phenotypically normal
Call genetically normal
Dhalf albino and half normal
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Question 1628
jamb 2000

The factors that determine the distribution of vegetation zones are

Atemperature, light, rain and humidity
Blight, humidity, air and mist
Ctemperature, light, air and humidity
Dhumidity, snow, frost and dew
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Question 1629
jamb 2000

The legs and beak of an egret resemble those of the heron because they

Aboth feed on fishes
Bare both birds
Coccupy similar niche
Doccupy the same trophic level
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Question 1630
jamb 2000

The disaster that would have the least destructive impact on animal life and balance in nature is

Achemical pollution
Bforest fires
Coil spillage
Dgrasshopper pests
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Question 1631
jamb 2000

In a food chain, each succeeding level in a forward direction represents

Aan increase in the number of individuals
Ba decrease in the number of individuals
Can increase in the biomass of individuals
Da gain in the total energy being transferred
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Question 1632
jamb 2000

Which of the following is an adaptation of tropical rainforest species?

AFew stomata
BThick bark
CButtress roots
DReduced leaves
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Question 1633
jamb 2000

Which of the following are adaptations of animals to aquatic habitats?

AGills, streamlined bodies and lateral lines
BLateral line, streamlined bodies and lungs
CGills, scaly skin and lungs
DGills, streamlined bodies and spiracles
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Question 1634
jamb 2000

Which of the following growth activities in plants is brought about by gibberellins?

ARapid cell division
BTropic response
CCell elongation
DMain cell elongation
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Question 1635
jamb 2000

The range at which soil essential elements concentration is recorded for optimal plant growth is marked

AIV
BIII
CII
DI
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Question 1636
jamb 2000

The soil becomes toxic to plants when the concentration of its essential elements is in the range labelled

AIV
BIII
CII
DI
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Question 1637
jamb 2000

I. High birth rate and high immigration rate II. Low birth rate and high immigration rate III. Low mortality rate and low emigration IV. High mortality rate and high emigration rate. Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?

AII and III
BI and III
CI and IV
DI and II
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Question 1638
jamb 2000

Atmospheric nitrogen is converted to soil nitrogen for plant use by

Anitrification and combustion
Bputrefaction and lightning
Clightning and nitrification
Dcombustion and putrefaction
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Question 1639
jamb 2000

An ecological succcession often leads to

Aan increase in species diversity
Bdecrease in species diversity
Can unstable community
Dthe dispersal of species
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Question 1640
jamb 2000

In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that:
initial volume of water .... = p cm3
volume of soil before mixing with water = q cm3
Final volume of water after adding soil = r cm3
From the data above, which of the following deductions is correct?

Ar = p + q
Br > p + q
Cq = r - p
Dr< p + q
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