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Biology
UTME / JAMB 2001
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The highest percentage of energy in an ecosystem occurs at the level of the
A
secondary consumer
B
decomposers
C
producers
D
primary consumers
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Producers have the highest percentage of energy in an ecosystem. Producers, such as plants, are at the base of the food chain and have the most energy. They use energy from the sun to create organic sugar.
Source: Myschool Past Questions Archive (Record #6627)
Biology
UTME / JAMB 2001
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The greatest influence on a stable ecosystem in nature is exerted by
A
man
B
pollution
C
animals
D
rainfall
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Humans, animals, and rainfall all have an impact on the stability of an ecosystem, but humans have the greatest influence. Humans have a pervasive influence on all ecosystems on Earth, and many are directly dominated by humans. Some of the influence are negative and they include pollution, deforestation, burning fossil fuels, Agriculture, habitat loss, over-harvesting etc
Source: Myschool Past Questions Archive (Record #6628)
Biology
UTME / JAMB 2001
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The physical space occupied by an organism together with its functional role in community can be described as
A
environment
B
biome
C
niche
D
habitat
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
An organism's niche is the role it plays in an ecosystem, including the conditions it needs to survive and reproduce, and its interactions with other organisms.
Source: Myschool Past Questions Archive (Record #6630)
Biology
UTME / JAMB 2001
Population Ecology, Habitats & Conservation
Solution
A freshwater pond may contain
A
tadpole, water boatman, leeches and crab
B
water beetle, shrimps, water snail and water bug
C
water lily, fish, water scorpion and dragon larva
D
pon skater, water lily, shark and mosquito larva
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Many organisms live in freshwater ponds, including Insects(dragon fly), frogs, fresh water snails, bacteria, daphnia, water lily, fishes etc
Source: Myschool Past Questions Archive (Record #6636)
Biology
UTME / JAMB 2001
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The hygrometer is used for measuring
A
relative humudity
B
specific gravity
C
rainfall
D
salinity
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
A hygrometer is a device that measures the humidity, or amount of water vapor, in the air
Source: Myschool Past Questions Archive (Record #6639)
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)