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Showing 9201–9250 of 10710 questions
Instruction
JAMB Biology 1995
JAMB (UTME)
Biology
1995
Q9201.A person with type O blood can donate to a patient with type A because the donor's blood
Alacks antigens
Blacks anti-A antibodies
Clacks anti-B antibodies
Dhas both anti-A and anti-B antibodies
Correct Answer: A
Type O blood lacks A and B antigens, so it can be donated to any blood group.
JAMB (UTME)
Biology
1995
Q9202.The DNA molecule is a chain of repeating
Anucleosides
Bnitrogenous bases
Csugar phosphates
Dnucleotides
Correct Answer: D
DNA is a polymer of nucleotides.
JAMB (UTME)
Biology
1995
Q9203.The specific number of chromosomes in each somatic cell is represented by
A$2^N$
B23
C2N
DN
Correct Answer: C
Somatic cells are diploid (2N).
JAMB (UTME)
Biology
1995
Q9204.A man with blood group A is married to a woman with blood group A. Which of the following group combinations is possible if the family has three children?
AB, A, AB
BO, A, B
CB, AB, AB
DA, O, A
Correct Answer: D
Parents with blood group A (AO × AO) can have children with groups A and O.
JAMB (UTME)
Biology
1995
Q9205.The F1 of a cross between a tall and a dwarf plant was tall. The F1 was advanced to F2. How many of 120 F2 plants will be dwarf?
A30
B60
C90
D120
Correct Answer: A
F2 ratio is 3 tall : 1 dwarf. 1/4 of 120 = 30 dwarf plants.
JAMB (UTME)
Biology
1995
Q9206.The sons of a colour-blind woman will be colour blind regardless of the state of the father because
Athe egg determines the phenotype of the son
Bsons inherit the sex chromosomes of their mothers
Cthe father's sex chromosome is weaker in sons
Dsex-linked traits express dominance in females
Correct Answer: B
Sons inherit the X chromosome from their mother, so if she is colour blind, they will be too.
JAMB (UTME)
Biology
1995
Q9207.The slender, long and slightly curved beak of the sunbird is an adaptation for feeding on
Anectar
Bsmall seeds
Cbig seeds
Dinsects
Correct Answer: A
The sunbird's beak is adapted for feeding on nectar from flowers.
JAMB (UTME)
Biology
1995
Q9208.Scales on reptiles are a feature for
Aconserving water
Bconserving food
Cprotecting the skin
Dlocomotion
Correct Answer: A
Reptile scales prevent water loss (conserving water).
JAMB (UTME)
Biology
1995
Q9209.The colour of the ventral surface of a fish is lighter than that of the dorsal. This is mainly
Aan adaptation for movement
Ban adaptation for camouflage
Cfor attracting mates
Dfor regulating body temperature
Correct Answer: B
Counter-shading (dark dorsal, light ventral) is for camouflage.
JAMB (UTME)
Biology
1995
Q9210.The least evidence in support of the theory of evolution is provided by the study of
Aanatomy
Becology
Cgeology
Dembryology
Correct Answer: B
Ecology provides the least direct evidence for evolution.
JAMB (UTME)
Biology
1995
Q9211.From which group of animals are the mammals generally believed to have most recently evolved?
AReptiles
BFishes
CAmphibians
DBirds
Correct Answer: A
Mammals evolved from reptile-like ancestors (synapsids).
Instruction
JAMB Biology 1996
JAMB (UTME)
Biology
1996
Q9212.The organelle involved in tissue respiration is the
Aendoplasmic reticulum
Bribosome
Cgolgi body
Dmitochondrion
Correct Answer: D
Mitochondria are the site of aerobic respiration and energy production in cells.
JAMB (UTME)
Biology
1996
Q9213.A tissue can best be defined as
Aan aggregate of similar cells
Ban aggregate of cells performing a similar function
Can aggregate of similar cells performing the same function
Da mixture of different cell types performing the same function
Correct Answer: C
A tissue is a group of similar cells performing the same function.
JAMB (UTME)
Biology
1996
Q9214.Which of the following correctly summarizes the life cycle of a fern plant?
ASpore → prothallus → thallus → sporangium
BMale and female gametangia → zygospore → sporangium → spores
A bulb has a reduced stem with thick, fleshy storage leaves.
JAMB (UTME)
Biology
1996
Q9222.The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
Astomata
Blenticels
Cair spaces
Dguard cells
Correct Answer: D
Guard cells control the opening and closing of stomata.
JAMB (UTME)
Biology
1996
Q9223.Fungi are heterotrophic because they
Ahave no leaves
Black roots
Care filamentous
Dlack chlorophyll
Correct Answer: D
Fungi lack chlorophyll and cannot photosynthesize, so they are heterotrophic.
JAMB (UTME)
Biology
1996
Q9224.The major site of photosynthesis in the leaf is the
Apalisade parenchyma
Bmesophyll parenchyma
Cupper epidermis
Dlower epidermis
Correct Answer: A
The palisade mesophyll contains most chloroplasts and is the main site of photosynthesis.
JAMB (UTME)
Biology
1996
Q9225.5cm³ dilute sodium hydroxide solution and 5cm³ one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of
Aglucose
Bstarch
Cfat
Dprotein
Correct Answer: D
This is the Biuret test for proteins, which gives a purple colour.
JAMB (UTME)
Biology
1996
Q9226.The blood vessel which carries blood from the alimentary canal to the liver is the
Ahepatic artery
Bhepatic vein
Chepatic portal vein
Dmesenteric artery
Correct Answer: C
The hepatic portal vein carries nutrient-rich blood from the intestine to the liver.
JAMB (UTME)
Biology
1996
Q9227.Gaseous exchange in Aves occurs in the
Atracheoles
Bbronchi
Cair sacs
Dlungs
Correct Answer: D
Gas exchange in birds occurs in the lungs (parabronchi).
JAMB (UTME)
Biology
1996
Q9228.In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to CO₂ and
Awater
Bglycerol
Cethanol
Dcitric acid
Correct Answer: C
In anaerobic respiration in yeast, pyruvic acid is converted to ethanol and CO₂.
JAMB (UTME)
Biology
1996
Q9229.The excretory organ in insect is the
Akidney
Bmalpighian tubule
Cflame cell
Dnephridium
Correct Answer: B
Insects excrete nitrogenous waste through Malpighian tubules.
JAMB (UTME)
Biology
1996
Q9230.The structure labelled 5 is the
Asweat gland
Bsebaceous gland
Cblood vessel
Dnerve fibre
Correct Answer: B
The sebaceous gland secretes oil (sebum) onto the skin surface.
JAMB (UTME)
Biology
1996
Q9231.Melanin and keratin are produced in the part labelled
A2
B3
C4
D5
Correct Answer: A
Melanin and keratin are produced in the Malpighian layer (2) of the epidermis.
JAMB (UTME)
Biology
1996
Q9232.The bone of the neck on which the skull rests is known as the
Aodontoid process
Baxis
Catlas
Doccipital condyle
Correct Answer: C
The atlas (first cervical vertebra) supports the skull.
JAMB (UTME)
Biology
1996
Q9233.Which enzymes are contained in the pancreatic juice?
APtyalin, lipase and pepsin
BMaltase, erepsin and trypsin
CRennin, sucrase and lipase
DAmylase, lipase and trypsin
Correct Answer: D
Pancreatic juice contains amylase, lipase, and trypsin.
JAMB (UTME)
Biology
1996
Q9234.The part labeled 3 is the
Acartilage
Bligament
Csynovial fluid
Dbone
Correct Answer: A
The cartilage covers the ends of bones at a joint.
JAMB (UTME)
Biology
1996
Q9235.The function of the part labeled 1 is to
Asecrete a fluid which lubricates the joint
Battach muscles to the bones at the joint
Cbend the bones at the joint
Dhold the joint in place
Correct Answer: A
The synovial membrane (1) secretes synovial fluid which lubricates the joint.
JAMB (UTME)
Biology
1996
Q9236.Double fertilization in higher plants is significant because it ensures the
Aformation of a fertile embryo
Bformation of a fertile embryo and the endosperm
Cdevelopment of the seed
Ddevelopment of the fruit
Correct Answer: B
Double fertilization produces both the embryo (2n) and the endosperm (3n).
JAMB (UTME)
Biology
1996
Q9237.In mammalian development, the function of the yolk is to
Asupply nutrients to the embryo
Bact as the shock-absorber to the foetus
Csupply air to the embryo
Dfacilitate the process of excretion in the foetus
Correct Answer: A
The yolk sac provides nutrients to the early embryo before the placenta forms.
JAMB (UTME)
Biology
1996
Q9238.Hypogeal germination is characterized by the
Aemergence of the plumule out of the ground
Bprovision of nourishment by the endosperm
Celongation of the hypocotyl
Delongation of the epicotyl
Correct Answer: D
In hypogeal germination, the epicotyl elongates and the cotyledons remain underground.
JAMB (UTME)
Biology
1996
Q9239.Fruits which develop without fertilization of the ovule are
Afalse
Bmultiple
Caggregate
Dparthenocarpic
Correct Answer: D
Parthenocarpic fruits develop without fertilization (e.g., seedless bananas).
JAMB (UTME)
Biology
1996
Q9240.Which part of the curve represents the fastest rate of growth?
AK
BL
CM
DN
Correct Answer: C
Point M is the steepest part of the sigmoid growth curve, indicating the fastest growth rate.
JAMB (UTME)
Biology
1996
Q9241.The grand period of growth is represented by
AN
BM
CL
DK
Correct Answer: B
The grand period of growth is the phase of rapid exponential growth (M).
JAMB (UTME)
Biology
1996
Q9242.Neurons that receive stimuli from the body or internal organs are called
Asensory neurons
Befferent neurons
Cmotor neurons
Drelay neurons
Correct Answer: A
Sensory (afferent) neurons receive stimuli and transmit them to the CNS.
JAMB (UTME)
Biology
1996
Q9243.Which of the following is true of a climax community?
AIt persists until the environment or climate changes
BIt changes drastically from one year to the next
CIt is the first stage in succession
DIt is made up of the tallest trees and the smallest animals
Correct Answer: A
A climax community is stable and persists until the climate or environment changes.
JAMB (UTME)
Biology
1996
Q9244.A population is defined as a collection of similar organisms that
Abehave in the same way
Binterbreed freely
Care found in the same habitat
Deat the same food
Correct Answer: B
A population consists of organisms of the same species that can interbreed freely.
JAMB (UTME)
Biology
1996
Q9245.In typical predator food chain involving secondary and tertiary consumers, the organisms become progressively
Asmaller and more numerous along the food chain
Bequal in number and size along the food chain
Clarger and fewer along the food chain
Dparasitized along the food chain as consumers get bigger
Correct Answer: C
In a food chain, organisms generally become larger and fewer at higher trophic levels.
JAMB (UTME)
Biology
1996
Q9246.Which level of the pyramid has the least total stored energy?
AE
BF
CG
DH
Correct Answer: D
The highest trophic level (H) has the least energy due to energy loss at each level.
JAMB (UTME)
Biology
1996
Q9247.Which organism in the pyramid functions as a tertiary consumer?
AAlgae
BShark
CTadpole
DTilapia
Correct Answer: B
The shark is at the top of the food chain, functioning as a tertiary consumer.
JAMB (UTME)
Biology
1996
Q9248.Mangrove swamp can be found
Aon a sea shore with flat terrain
Bwhere a river meets the sea
Con a mud flat near the sea
Dwhere two rivers meet
Correct Answer: B
Mangrove swamps are found in estuarine areas where rivers meet the sea.
JAMB (UTME)
Biology
1996
Q9249.Soil with the finest particles is called
Asilt
Bclay
Csand
Dgravel
Correct Answer: B
Clay particles are the finest soil particles.
JAMB (UTME)
Biology
1996
Q9250.Malaria symptoms are caused by
Atoxins released into the blood as a result of the destruction of blood cells
Bthe multiplication of the malaria sporozoites in the liver
Cthe invasion of the red blood cells by the trophozoites
Dthe development of merozoites into gametocytes
Correct Answer: A
Malaria symptoms are caused by toxins released when red blood cells rupture.