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Biology
UTME / JAMB 2001
Variety of Organisms & Classification of Living Things
Solution
The distribution of plants in a rain forest is governed mainly by
A
vegetation
B
soil types
C
amount of sunlight
D
rainfall pattern
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Several factors govern the distribution of plants in a rainforest, including temperature and rainfall
Source: Myschool Past Questions Archive (Record #6640)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
Both recessive and dominant characters are found
A
on different chromosomes in the cell
B
at the same locus of a homologous chromosome
C
at different loci of a homologous chromosome
D
on the same chromatid in a chromosome
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Both recessive and dominant characters can be found at the same locus of a homologous chromosome. Chromosomes in a homologous pair have the same genes in the same order, but they may have different alleles. Option B is the correct answer
Source: Myschool Past Questions Archive (Record #6642)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
The probability of a baby being a boy or a girl depends on the contribution of the
A
father's sex cell
B
father's somatic chromosome
C
mother's sex cell
D
mother's X-chromosome
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
The probability of a baby being a boy or a girl depends on the father's sex cells because sperm cells can have either an X or a Y chromosome, while eggs always have an X chromosome.
Source: Myschool Past Questions Archive (Record #6644)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
Which of the following statements is true of blood groups and blood transfusion?
A
Group O is the universal recipient
B
Group A can donate to group A only
C
Group AB is the universal recipient
D
Group B can donate to group B only
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Blood Group O is the universal donor while Group AB is the universal recepient. A and B can donate to AB. Option C is the correct answer.
Source: Myschool Past Questions Archive (Record #6646)
Biology
UTME / JAMB 2001
Reproduction in Plants & Animals
Solution
Which of the following is likely to encourage inbreeding in plants?
A
Dioecious
B
Protandrous
C
Monoecious
D
Hermaphrodite
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Hermaphrodite (or bisexual) flowers contain both male (stamens) and female (carpels) reproductive organs within the same flower. Because these organs are physically close and often mature simultaneously, there is a high likelihood of self-pollination, which directly leads to inbreeding.
Source: Myschool Past Questions Archive (Record #6648)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents?
A
TT, TT
B
Tt, tt
C
TT, tt
D
Tt, Tt
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The parents' genotypes are:
Heterozygous Tall ( Tt ) and Homozygous for Dwarfism ( tt )
Source: Myschool Past Questions Archive (Record #6650)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
In man, the ability to roll the tongue is a variation classified as
A
anatomical
B
physiological
C
structural
D
morphological
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Physiological variation is when members of the same species react to their environment differently. Here are some examples of physiological variation in humans and animals. E.g People have different abilities to taste phenylthiocarbamide (PTC), roll their tongues, and have different blood types.
Morphological variation is the difference in the structure and form of organisms, which can occur within or between species. It can be caused by genetic factors, environmental factors, or a combination of both. Some examples of morphological variation include: Hair colour, hair quantity, extra body parts, and missing body parts in humans.
Source: Myschool Past Questions Archive (Record #6651)
Biology
UTME / JAMB 2001
Adaptation & Evolution
Solution
Darwin is considered the first scientist who correctly explained the theory of
A
special creation
B
spontaneous generation
C
use and disuse
D
organic evolution
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Special creation - Louis Pasteur
Spontaneous generation - Aristotle
Use and disuse - Jean Baptiste Lamarck
Charles Darwin is known as the first scientist to propose the theory of evolution by natural selection.
Source: Myschool Past Questions Archive (Record #6653)
Biology
UTME / JAMB 2001
Variety of Organisms & Classification of Living Things
Solution
The stem of a typical aquatic plant usually has many
A
air cavities
B
intercellular space
C
water cavities
D
water conducting cells
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Aquatic plants have large air cavities in their stems, leaves, and roots, which are called aerenchyma. Aerenchyma is a spongy tissue that creates air channels and gaps in the plant. These air cavities help the plant float and provide buoyancy.
Source: Myschool Past Questions Archive (Record #6655)
Biology
UTME / JAMB 2001
Adaptation & Evolution
Solution
The role of the male adult honey bee is to
A
clean the hive
B
ventilates the hive
C
mate with the queen
D
care for the young
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The main role of a male honey bee, also known as a drone, is to mate with the queen bee in order to fertilize new queens.
Source: Myschool Past Questions Archive (Record #6656)
Biology
UTME / JAMB 2001
Variation & Genetics (Heredity)
Solution
The ability of an organism to live successfully in an environment is known as
A
resistance
B
competetion
C
succession
D
adaptation
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Adaptation is a heritable trait that helps an organism survive and reproduce in its environment. Adaptations can be behavioral, morphological, or physiological. They can be the result of a gene mutation that improves an organism's ability to survive and reproduce. Over time, the mutation becomes more common as it passes to offspring.
Source: Myschool Past Questions Archive (Record #6657)
Biology
UTME / JAMB 2001
Adaptation & Evolution
Solution
The most important adaptation of xerophytes is the ability of the protoplasm to
A
resist being damaged by loss of water
B
store sugar and minerals in the vacuoles
C
absorbs water and swell
D
shrink from the cell wall
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Xerophytes are plants that have adapted to survive in dry environments, such as deserts, salt marshes, and saline soils. The most adaptation is to resist being damaged by loss of water
Source: Myschool Past Questions Archive (Record #6659)
Biology
UTME / JAMB 2001
Adaptation & Evolution
Solution
A green snake in green grass is able to escape notice from predators because of its
A
disruptive colouration
B
counter shading
C
warning colouration
D
cryptic colouration
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Disruptive coloration is a camouflage technique that uses contrasting patterns to break up an animal's outline and make it harder to see.
Countershading is a type of camouflage where an animal's upper body is darker than its underside.
Warning coloration is a defense mechanism used by animals to warn predators that they are toxic, distasteful, or have other harmful qualities.
Cryptic colouration, also known as camouflage, is a defense mechanism that helps organisms hide their identity, location, and movement by blending in with their surroundings. It's a common form of visual camouflage that uses color patterns to make it harder for predators to see the organism.
Source: Myschool Past Questions Archive (Record #6661)
Biology
UTME / JAMB 2001
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
For heterotrophic organisms, competition is least caused by the inadequacy of
A
mates
B
space
C
light
D
nutrients
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Among autotrophs, Light is the major cause of competition because they need sunlight to manufacture their food and survive unlike heterotrophs. Hence,competition is least caused by inadequacy of light.
Source: Myschool Past Questions Archive (Record #6663)
Biology
UTME / JAMB 2001
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
For heterotrophic organisms, competition is least caused by the inadequacy of
A
mates
B
space
C
light
D
nutrients
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Among autotrophs, Light is the major cause of competition because they need sunlight to manufacture their food and survive unlike heterotrophs. Hence,competition is least caused by inadequacy of light.
Source: Official Exam / Past Question Archive