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"Ecology" question number distribution across years
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JAMB questions for "Biology :: Ecology"
Q1
The most important ecological factor in a terrestrial environment is
A
rainfall
B
humidity
C
wind
D
soil
E

Answer: D

Ecology
Q2
In freshwater marshes and swamps, the most important abiotic factor that organisms have to adapt to is
A
nature of substratum
B
high salinity
C
high temperature
D
low pH
E

Answer: A

Ecology
Q3
Which of the following biomass could be characterized by very low rainfall, cold nights, hot days and fast blooming plants?
A
Northern Guinea Savannah
B
Southern Guinea Savannah
C
Tropical desert
D
Montane forest
E

Answer: A

Ecology
Q4
The zone of physiological stress is represented by
A
I and II
B
II only
C
II and III
D
I and III
E

Answer: D

Ecology
Q5
The major cause of global warming is the
A
burning of fossil fuel
B
construction of dams
C
use of electricity
D
exploration of space
E

Answer: A

Ecology
Q6
The uniqueness of an individual organism in a population is accounted for by
A
evolution
B
variation
C
adaptation
D
mutation
E

Answer: C

Ecology
Q7
A phenotypic character with intermediate forms that can be graded from one extreme to the other is reffered to as
A
discontinuous variation
B
continuous variation
C
a mutant
D
a genome
E

Answer: B

Ecology
Q8
A farmer's assumption that the seed from a good harvest will produce a good yielded is explained by theory of
A
evolution
B
adaptation
C
variation
D
heredity
E

Answer: D

Ecology
Q9
In Mendelian inheritance, discontinuos characters are controled by the
A
centromeres
B
alleles
C
chromosomes
D
chromatids
E

Answer: C

Ecology
Q10
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt) . What is the probability of each of their children being a tongue roller?
A
100%
B
75%
C
50%
D
25%
E

Answer: C

Ecology
Q11
A health condition that is known to have resulted from gene mutation is
A
hemophilia
B
color blindness
C
sickle-cell anemia
D
anemia
E

Answer: A

Ecology
Q12
Plants that grow in an area that is neither too wet nor too dry are
A
xerophytes
B
mesophytes
C
epiphytes
D
hydrophytes
E

Answer: B

Ecology
Q13
The bacteria type that are arranged in chains are the
A
staphylococci
B
Clostridia
C
Streptococci
D
Bacilli
E

Answer: A

Ecology
Q14
The part labeled IV indicates that the yeast population has
A
reached its maximum size
B
reached senescence
C
stopped metabolizing food
D
started dying
E

Answer: A

Ecology
Q15
The major consequence of bush burning in an ecosystem is
A
the loss of water absorbing ability of the soil
B
the loss of biological diversity
C
a decrease in animal population
D
an increase in soil fertility
E

Answer: B

Ecology
Q16
Which of the following associations is an example of mutualism?
A
Hydra viridis and zoochlorellae
B
Human and lice
C
Shark and Remora fish,
D
Bread and Rhizopus stolonifer
E

Answer: A

Ecology
Q17
In a typical freshwater habitat, the edge of the stream or pond constitutes the
A
tidal zone
B
intertidal zone
C
littoral zone
D
euphotic zone
E

Answer: C

Ecology
Q18
The main ecological problem facing intertidal organisms is
A
dessication
B
flotation
C
salinity
D
humidity
E

Answer: B

Ecology
Q19
An ecological factor that will have the most limiting effect on the abundance of phytoplankton in a turbid pond is
A
pH
B
oxygen
C
light
D
temperature
E

Answer: C

Ecology
Q20
If species I, II and III interact in a community, which of the following statements is true?
A
The population of the species II is growing at a slow rate
B
The population of species III has reached its carrying capacity
C
The population of species I has become extinct
D
The population of species I is always higher than species II
E

Answer: C

Ecology
Q21
The population size of species II on the 20th day is
A
100
B
200
C
300
D
400
E

Answer: B

Ecology
Q22
A boy who is fond of swimming in a pond finds himself passing urine with traces of blood. He is likely to have contracted
A
schistosomiasis
B
onchocerciasis
C
poliomyelitis
D
salmonellosis
E

Answer: A

Ecology
Q23
The easiest way to establish the level of pollution in a local stream is to measure the level of
A
oxygen
B
carbon (IV) oxide
C
ammonia
D
alkalinity
E

Answer: A

Ecology
Q24
Which of the following is a major cause of variation among organisms?
A
Inbreeding
B
Backcrossing
C
Sexual reproduction
D
Gene dominance
E

Answer: D

Ecology
Q25
The Rhesus factor of blood was first identified in a category of
A
monkeys
B
human females
C
human males
D
chimpanzees
E

Answer: B

Ecology
Q26
Which of the four offspring of the cross will be short if T the gene for tallness is dorminant to t?
A
I
B
II
C
III
D
IV
E

Answer: D

Ecology
Q27
The genotypic ratio of the offspring of the cross is
A
1:2
B
1:2:1
C
1:1:1:1
D
3:1
E

Answer: B

Ecology
Q28
Genetically modified food products have not become universally accepted because
A
they are not tasty as others produced by conventional means
B
they are usually costlier than others produced by conventional means
C
their effects on human consumers is not yet fully understood
D
the technology can be applied only in developed countries
E

Answer: C

Ecology
Q29
The increasing order of the particle size in the following soil types is
A
clay -->sand -->silt-->gravel
B
silt-->sand-->clay-->gravel
C
clay-->silt-->sand-->gravel
D
silt-->clay-->sand -->gravel
E

Answer: C

Ecology
Q30
The causative agent of bird flu is a
A
protozoan
B
virus
C
bacterium
D
fungus
E

Answer: B

Ecology
Q31
Which of the following is an example of parasitism?
A
Fungi growing on a dead tree branch
B
A squirrel living in an abandoned nest of a bird
C
Mistletoe growing on an orange tree
D
Cattle egrets taking ticks from the body of cattle
E

Answer: C

Ecology
Q32
The highest level of ecological organization is the
A
ecosystem
B
population
C
biosphere
D
niche
E

Answer: C

Ecology
Q33
The mangrove swamp in Nigeria is restricted to the
A
Sahel savanna
B
Sudan savanna
C
Guinea savanna
D
Tropical rainforest
E

Answer: D

Ecology
Q34
A biotic factor which affects the distribution and abundance of organisms in a terrestrial habitat is
A
temperature
B
competition
C
pH
D
light
E

Answer: A

Ecology
Q35
In which of the following Nigerian states can mountain vegetation be found?
A
Taraba
B
Enugu
C
Bauchi
D
Plateau
E

Answer: D

Ecology
Q36
The organelle responsible for heredity is
A
III
B
IV
C
II
D
I
E

Answer: A

Ecology
Q37
The part labeled I is the
A
nuclear membrane
B
cell wall
C
endoplasmic reticulum
D
plasmallema
E

Answer: D

Ecology
Q38
An accurate identification of a rapist can be carried out by by conducting a
A
RNA analysis
B
DNA analysis
C
blood group test
D
behavioral traits test
E

Answer: B

Ecology
Q39
If the dogs are offspring of a mono hybrid cross and the gene G for grey head is dominant cross over its allele g, the individual whose genotypes is likely to be gg is
A
II
B
I
C
IV
D
III
E

Answer: B

Ecology
Q40
Which of the following will be true of dog II which lost its tail in an accident if it mates with dog III
A
None of it offspring will be born without a tail
B
3/4 of its offspring will be born without tails
C
All its offspring will be born without tails
D
1/4 of its offspring will be born without tails
E

Answer: A

Ecology
Q41
Which of the following is true of cloning?
A
it is welcomed as an ethically and morally sound science
B
Only one cell of the original organism is needed to initiate the process
C
The clone is similar to but not exactly like the original organism
D
it involves the asexual multiplication of the tissues of the original organism
E

Answer: D

Ecology
Q42
An example of a sex-linked trait is the
A
ability to grow long hair in females
B
colour of the skin in humans
C
ability to roll the tongue
D
possession of facial hair in adult humans
E

Answer: D

Ecology
Q43
Sexual reproduction is illustrated in
A
II
B
I
C
III
D
IV
E

Answer: B

Ecology
Q44
A plant that exhibits the type of reproduction shown in IV is
A
Cola
B
Ginger
C
Bryophyllum
D
Sugar cane
E

Answer: C

Ecology
Q45
Hassan and Hussain are identical twins but Hassan grows taller and fatter than Hussain. This is probably because
A
Hassan inherits genes for tallness and fatness from the father
B
They have dissimilar genotypes
C
Hussain is endowed with genes for shortness and thiness
D
They are raised in different environments
E

Answer: D

Ecology
Q46
The two normal types of sex chromosomes are
A
XXY and XYY
B
XX and SYY
C
XY and XXY
D
XX and XY
E

Answer: D

Ecology
Q47
The diagrams represents the structure of
A
proteins
B
chromosomes
C
RNA
D
DNA
E

Answer: D

Ecology
Q48
One advantage of variation in a species population is that individuals
A
with favored traits become dominant
B
easily reach their reproductive age
C
are easily recognised by mates
D
are better adapted to changes
E

Answer: C

Ecology
Q49
Mendel's second law of inheritance states that
A
alleles combine randomly
B
alleles segregate independently
C
alleles separate predictably
D
chromosome segregate independently
E

Answer: B

Ecology
Q50
The variation illustrated is
A
discontinuous
B
morphological
C
physiological
D
biochemical
E

Answer: B

Ecology
Q51
Grasses recover quickly from bush fires in the savanna because of their
A
perennating organs
B
rapid growth rate
C
fibrous roots
D
succulent stems
E

Answer: C

Ecology
Q52
Climax communities in a biotic succession are usually characterized by
A
a constant change in the appearance of the communities
B
different species that are constantly changing
C
a stable composition of plant and animal
D
rapid changes in the plant and animal species
E

Answer: C

Ecology
Q53
Which of the following can be decided from the distribution?
A
Species II is found only in locations where it rains all year round
B
Species III increases only in number as rainfall increases
C
The distribution of species IV is not dependent on rainfall
D
Species I thrives under conditions of moderate to high rainfall
E

Answer: D

Ecology
Q54
The species whose distribution is not affected by rainfall is
A
II
B
IV
C
I
D
III
E

Answer: A

Ecology
Q55
The soil type that contains nutrients which are not readily available for plants is
A
alluvial
B
clayey
C
sandy
D
loamy
E

Answer: A

Ecology
Q56
The association illustrated demonstrates
A
parasitism
B
commensalism
C
saprophytism
D
mutualism
E

Answer: D

Ecology
Q57
A population that doubles in size at constant intervals is an indication of
A
sigmoid growth
B
exponential growth
C
population explosion
D
rapid growth
E

Answer: B

Ecology
Q58
Check desert encroachment
A
xxx
B
provide wood fuel
C
beautiful the region
D
break the harmattan wind
E

Answer: D

Ecology
Q59
The association in which one member benefits and the other is relatively unaffected by the interraction is termed
A
commensalism
B
mutualism
C
parasitism
D
symbiosis
E

Answer: A

Ecology
Q60
The only caste in the termite colony whose members can feed themselves are the
A
workers
B
reproductive s
C
soldiers
D
nymphs
E

Answer: A

Ecology