Instruction
JAMB Biology 1999
JAMB (UTME)
Biology
1999
Q9401.
Which of the following relationships involves only one organism?
A
Saprophytism
B
Commensalism
C
Parasitism
D
Symbiosis
Correct Answer: A
Saprophytism involves a single organism feeding on dead matter.
JAMB (UTME)
Biology
1999
Q9402.
Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats?
A
pH
B
Salinity
C
Water current
D
Turbidity
Correct Answer: B
Salinity is the most important factor distinguishing marine and freshwater habitats.
JAMB (UTME)
Biology
1999
Q9403.
Which of these groups of animals is likely to be found in fresh water?
A
Blood worm, pond skater and scorpion
B
Blood worm, pond skater and dragonfly larva
C
Pond skater, scorpion and dragonfly larva
D
Pond skater, blood worm and ant-lion
Correct Answer: B
Blood worm, pond skater, and dragonfly larva are found in freshwater.
JAMB (UTME)
Biology
1999
Q9404.
One of the characteristics of plants in the savanna is the
A
possession of thin, smooth barks
B
possession of large tap roots
C
production of seedlings on mother plant
D
possession of thick, flaky barks
Correct Answer: D
Savanna plants have thick, flaky barks to resist fire.
JAMB (UTME)
Biology
1999
Q9405.
Which of the following diseases can be contracted in areas with fast-flowing rivers?
A
Schistosomiasis
B
Elephantiasis
C
Syphilis
D
Onchocerciasis
Correct Answer: D
Onchocerciasis (river blindness) is associated with fast-flowing rivers.
JAMB (UTME)
Biology
1999
Q9406.
Which of the following causes pollution?
A
Consumption of canned drinks
B
The addition of fertilizer to farmland
C
Respiration of living organisms
D
Burning of refuse
Correct Answer: D
Burning of refuse causes air pollution.
JAMB (UTME)
Biology
1999
Q9407.
The mineral nutrient that is most bound to the soil is
A
phosphorus
B
calcium
C
iron
D
potassium
Correct Answer: A
Phosphorus is strongly bound to soil particles and is less available to plants.
JAMB (UTME)
Biology
1999
Q9408.
The mineral nutrient that easily gets leached is
A
calcium
B
magnesium
C
potassium
D
phosphorus
Correct Answer: C
Potassium is highly soluble and easily leached from the soil.
JAMB (UTME)
Biology
1999
Q9409.
Most commercial fertilizers are rich in salts of
A
sodium, iron and calcium
B
nitrogen, phosphorus and potassium
C
iron, copper and nitrogen
D
calcium, sodium and phosphorus
Correct Answer: B
Commercial fertilizers contain N, P, and K (nitrogen, phosphorus, potassium).
JAMB (UTME)
Biology
1999
Q9410.
Dead plants and animals are decomposed by bacteria and fungi into
A
humus
B
minerals
C
water
D
air
Correct Answer: A
Decomposition produces humus, which enriches the soil.
Instruction
JAMB Biology 2000
JAMB (UTME)
Biology
2000
Q9411.
The function of endoplasmic reticulum is
A
protein synthesis
B
intracellular transport of materials
C
digestion and destruction of foreign bodies
D
production of energy from glucose
Correct Answer: B
The endoplasmic reticulum is involved in the intracellular transport of materials.
JAMB (UTME)
Biology
2000
Q9412.
Which of the following features of Euglena is found only in animals?
A
Paramylum granules
B
Flagellum
C
Pellicle
D
Pyrenoid
Correct Answer: B
Flagellum is a feature found in both Euglena and animal cells (e.g., sperm).
JAMB (UTME)
Biology
2000
Q9413.
An organism found on a bare rock surface has features of algae and fungi. The organism is
A
an epiphyte
B
a lichen
C
a bryophyte
D
a fern
Correct Answer: B
Lichens are symbiotic associations of algae and fungi.
JAMB (UTME)
Biology
2000
Q9414.
In a plant exhibiting alternation of generations, the diploid multicellular stage is known as
A
gametophyte
B
spermatophyte
C
holophyte
D
sporophyte
Correct Answer: D
The sporophyte is the diploid multicellular stage.
JAMB (UTME)
Biology
2000
Q9415.
A characteristic that distinguishes bryophytes from flowering plants is the
A
possession of true stems and leaves
B
ability to reproduce asexually
C
absence of vascular tissues
D
ability to grow in moist habitats
Correct Answer: C
Bryophytes lack vascular tissues (xylem and phloem).
JAMB (UTME)
Biology
2000
Q9416.
A good example of a diploblastic organism is
A
Amoeba
B
Hydra
C
Earthworm
D
Roundworm
Correct Answer: B
Hydra is diploblastic (has two germ layers).
JAMB (UTME)
Biology
2000
Q9417.
The function of the clitellum in the earthworm is to
A
aid digestion
B
prevent desiccation
C
assist locomotion
D
secrete cocoon
Correct Answer: D
The clitellum secretes the cocoon for egg deposition.
JAMB (UTME)
Biology
2000
Q9418.
The crayfish is an arthropod because
A
its body consists of a cephalothorax and an abdomen
B
it has a pair each of antennae and antennules
C
every segment of its body carries a pair of appendages
D
its body is covered with an exoskeleton made of chitin
Correct Answer: D
The chitinous exoskeleton is the defining feature of arthropods.
JAMB (UTME)
Biology
2000
Q9419.
The hypha of Rhizopus is said to be coenocytic because it
A
does not contain chlorophyll
B
has no cross walls
C
is vacuolated
D
stores oil globules
Correct Answer: B
Coenocytic hyphae lack cross walls (aseptate).
JAMB (UTME)
Biology
2000
Q9420.
In most true ferns, sporangia are grouped into
A
indusium
B
fronds
C
prothalli
D
sori
Correct Answer: D
Sporangia are grouped into sori on the underside of fern fronds.
JAMB (UTME)
Biology
2000
Q9421.
In the reproduction of mosses, water is essential because
A
they live in moist habitats
B
they cannot reproduce without water
C
the male gametes must swim to fertilize the ovum
D
they produce spores
Correct Answer: C
Moss sperm must swim through water to reach the egg.
JAMB (UTME)
Biology
2000
Q9422.
In tapeworm, the two structures that run through the length of the body are the
A
nerve cord and the excretory duct
B
sperm duct and the nerve cord
C
genital pore and the excretory duct
D
sperm duct and the genital pore
Correct Answer: A
The nerve cord and excretory duct run the length of the tapeworm.
JAMB (UTME)
Biology
2000
Q9423.
Which of the following is NOT a characteristic of snails?
A
Bilateral symmetry
B
Chitinous exoskeleton
C
Muscular foot
D
Soft unsegmented body in a mantle
Correct Answer: B
Snails have a calcareous shell, not a chitinous exoskeleton.
JAMB (UTME)
Biology
2000
Q9424.
In the life history of a butterfly, destruction of crops is caused by the
A
maggot
B
nymph
C
caterpillar
D
pupa
Correct Answer: C
The caterpillar (larval stage) of butterflies destroys crops.
JAMB (UTME)
Biology
2000
Q9425.
The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is
A
pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
B
xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
C
pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
D
phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis
Correct Answer: C
From inside out: pith → xylem → cambium → phloem → cortex → epidermis.
JAMB (UTME)
Biology
2000
Q9426.
Secondary thickening is initiated in a dicotyledonous stem by the
A
xylem parenchyma
B
secondary phloem
C
endodermis
D
cambium
Correct Answer: D
The cambium is responsible for secondary thickening.
JAMB (UTME)
Biology
2000
Q9427.
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
A
prevent algal growth in culture solution
B
allow root growth
C
prevent breakdown of mineral elements
D
prevent photosynthesis in the root
Correct Answer: A
Darkening prevents algal growth which would affect mineral content.
JAMB (UTME)
Biology
2000
Q9428.
The vitamin which is important in the formation of the retina pigments is
A
vitamin A
B
vitamin B
C
vitamin C
D
vitamin D
Correct Answer: A
Vitamin A is essential for the formation of rhodopsin in the retina.
JAMB (UTME)
Biology
2000
Q9429.
Which of the following lists of organs is directly involved in nutrition?
A
Oesophagus, bronchus, stomach, pancreas and anus
B
Spleen, pharynx, duodenum, jejunum and rectum
C
Teeth, oesophagus, ileum, lungs and large intestine
D
Salivary gland, liver, stomach, villi and colon
Correct Answer: D
Salivary gland, liver, stomach, villi, and colon are all involved in nutrition.
JAMB (UTME)
Biology
2000
Q9430.
In the standard experiment to show that oxygen is given off during photosynthesis, sodium bicarbonate is used to
A
neutralize the acid in water
B
supply mineral salts to water plant
C
supply carbon dioxide for photosynthesis
D
kill micro-organisms in water
Correct Answer: C
Sodium bicarbonate supplies CO₂ for photosynthesis.
JAMB (UTME)
Biology
2000
Q9431.
One cubic centimeter of lymph is richer than an equal volume of blood in
A
erythrocytes
B
leucocytes
C
amino acid
D
glucose
Correct Answer: B
Lymph contains more leucocytes (white blood cells) than blood.
JAMB (UTME)
Biology
2000
Q9432.
The oxidative part of the respiration process takes place in the
A
mitochondria
B
ribosomes
C
endoplasmic reticulum
D
golgi bodies
Correct Answer: A
Mitochondria are the site of oxidative respiration.
JAMB (UTME)
Biology
2000
Q9433.
Fatigue of leg muscles may occur after riding many kilometers on a bicycle because of
A
insufficient glucose
B
excess carbohydrate
C
excess protein
D
insufficient oxygen
Correct Answer: D
Insufficient oxygen causes anaerobic respiration and lactic acid buildup.
JAMB (UTME)
Biology
2000
Q9434.
The function of the loop of Henle is to
A
increase the flow of urine
B
concentrate amino acids in the kidney tissue
C
concentrate sodium chloride in the medulla of the kidney
D
increase the volume of urine
Correct Answer: C
The loop of Henle concentrates sodium chloride in the kidney medulla.
JAMB (UTME)
Biology
2000
Q9435.
Which of the plants is likely to have broad leaves with thin cuticle?
Correct Answer: A
Plant R has the highest transpiration rate, suggesting broad leaves with thin cuticle.
JAMB (UTME)
Biology
2000
Q9436.
Which of the plants is likely to be a desert species?
Correct Answer: A
Plant U has the lowest transpiration rate, typical of desert plants.
JAMB (UTME)
Biology
2000
Q9437.
Sclerenchyma cells are lignified to
A
strengthen and support the plant
B
transport synthesized food
C
conduct water and salt
D
protect the plant from injury
Correct Answer: A
Lignified sclerenchyma cells provide strength and support.
JAMB (UTME)
Biology
2000
Q9438.
The pineapple fruit is best described as
A
aggregate, succulent and indehiscent
B
aggregate, succulent and dehiscent
C
multiple, succulent and indehiscent
D
multiple, succulent and dehiscent
Correct Answer: C
Pineapple is a multiple fruit that is succulent and indehiscent.
JAMB (UTME)
Biology
2000
Q9439.
The flower shown above is
A
complete, regular, hermaphroditic with inferior ovary
B
incomplete, regular, staminate with inferior ovary
C
complete, regular, hermaphroditic with superior ovary
D
incomplete, irregular, pistillate with superior ovary
Correct Answer: C
The flower has all floral parts (complete), is radially symmetrical (regular), and has both sexes.
JAMB (UTME)
Biology
2000
Q9440.
A flower showing radial symmetry is said to be
A
pentamerous
B
protandrous
C
protogynous
D
actinomorphic
Correct Answer: D
Actinomorphic flowers have radial symmetry.
JAMB (UTME)
Biology
2000
Q9441.
A samara differs from a cypsela by having
A
an extended pericarp
B
a hard pericarp
C
a pericarp fused with the seed coat
D
some hairy outgrowths on the pericarp
Correct Answer: A
A samara has a winged pericarp for wind dispersal.
JAMB (UTME)
Biology
2000
Q9442.
The plantain reproduces asexually by
A
suckers
B
buds
C
fragments
D
spores
Correct Answer: A
Plantain reproduces by suckers.
JAMB (UTME)
Biology
2000
Q9443.
Growth can best be determined in a population of Spirogyra by measuring the
A
total lengths of the filaments
B
total widths of the filaments
C
rate of photosynthesis in the population
D
dry weight of the organism
Correct Answer: D
Dry weight is the most reliable measure of growth.
JAMB (UTME)
Biology
2000
Q9444.
Most cells in higher animals retain their power of division EXCEPT
A
lymphocytes
B
nerve cells
C
malpighian cells
D
germ cells
Correct Answer: B
Nerve cells lose their ability to divide after maturity.
JAMB (UTME)
Biology
2000
Q9445.
A severe deficiency of thyroxin results in
A
diabetes mellitus
B
sexual underdevelopment
C
cretinism
D
gigantism
Correct Answer: C
Thyroxin deficiency in children causes cretinism.
JAMB (UTME)
Biology
2000
Q9446.
The growth of a coleoptile towards a unilateral light source is due to
A
rapid rate of photosynthesis
B
unequal distribution of auxin
C
the effect of geotropism
D
the effect of photolysis
Correct Answer: B
Unequal auxin distribution causes differential growth towards light.
JAMB (UTME)
Biology
2000
Q9447.
The sequence of ear ossicles from the fenestra ovalis is
A
malleus, incus and stapes
B
malleus, stapes and incus
C
stapes, incus and malleus
D
stapes, malleus and incus
Correct Answer: C
From the fenestra ovalis: stapes → incus → malleus.
JAMB (UTME)
Biology
2000
Q9448.
The centre for controlling body temperature in the brain is the
A
cerebrum
B
cerebellum
C
medulla
D
hypothalamus
Correct Answer: D
The hypothalamus controls body temperature.
JAMB (UTME)
Biology
2000
Q9449.
Unlike auxins, gibberellins
A
induce the formation of adventitious roots
B
do not affect leaf and fruit abscission
C
cannot stimulate stem elongation
D
are quite effective as herbicides
Correct Answer: B
Gibberellins do not affect leaf and fruit abscission.
JAMB (UTME)
Biology
2000
Q9450.
A gene which expresses itself only in the homozygous condition is
A
a mutant
B
dominant
C
recessive
D
lethal
Correct Answer: C
Recessive genes express only in the homozygous condition.