Practice post utme greenfield university biology 2022 Past Questions

Question 1

In a tropical rainforest e\cosystem, what is the primary role of the leafy canopy in regulating the environment?

A. To absorb and store sunlight for photosynthesis

Correct B. To regulate the temperature and humidity levels

C. To provide shelter and habitat for various species

D. To facilitate the movement of water and nutrients

Correct Answer: B

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Question 2

A bio\logist is studying the population dynamics of a species of deer in a forest e\cosystem. Which of the following factors would most likely affect the population growth rate?

A. Availability of food resources

Correct B. Predation by other animals

C. Disease outbreaks

D. Climate change

Correct Answer: B

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Question 3

A diagram of a plant cell is shown below. Identify the component labeled 'X'.

A. Vacuole

B. Mitochondria

C. Plastid

Correct D. Nucleus

Correct Answer: D

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Question 4

A diagram of a human kidney is shown below. Identify the component labeled 'Y'.

Correct A. Renal Papilla

B. Renal Cortex

C. Renal Medulla

D. Ureter

Correct Answer: A

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Question 5

A diagram of a human heart is shown below. Identify the component labeled 'Z'.

Correct A. Atrium

B. Ventricle

C. Aorta

D. Pulmonary Vein

Correct Answer: A

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Question 6

The Hardy-Weinberg principle states that a population's allele and genotype frequencies will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?

A. Random mating

B. No mutation

C. No gene flow

Correct D. No natural selection

Correct Answer: D

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Question 7

In the classification of living organisms, which of the following is a characteristic of the domain Archaea?

A. Cell wall

B. Chloroplasts

Correct C. No true nucleus

D. Peptidoglycan cell wall

Correct Answer: C

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Question 8

The process of excretion in humans involves the removal of waste products from the body. Which of the following is a function of the kidneys in this process?

A. Regulation of blood pressure

B. Production of urine

C. Maintenance of electrolyte balance

Correct D. All of the above

Correct Answer: D

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Question 9

The growth and development of an organism is influenced by various factors, including genetics and environment. Which of the following is an example of a genetic factor that influences growth?

A. Hormonal regulation

B. Nutritional intake

Correct C. Genetic mutations

D. Environmental toxins

Correct Answer: C

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Question 10

In the process of reproduction, which of the following is a characteristic of asexual reproduction?

A. Production of gametes

B. Fusion of gametes

Correct C. No genetic variation

D. No offspring

Correct Answer: C

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Question 11

In a closed e\cosystem, what is the primary mechanism by which oxygen is removed from the atmosphere?

A. Respiration

B. Photosynthesis

Correct C. Decomposition

D. Evaporation

Correct Answer: C

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Question 12

A plant's xylem is responsible for transporting what subs\tance from the roots to the leaves?

Correct A. Water

B. Minerals

C. Sugars

D. Proteins

Correct Answer: A

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Question 13

What is the primary function of the nervous system in an organism?

A. Regulation of body temperature

B. Maintenance of homeostasis

Correct C. Coordination of movements

D. Production of hormones

Correct Answer: C

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Question 14

Asexual reproduction in plants can occur through what method?

A. Budding

Correct B. Fragmentation

C. Runners

D. Spores

Correct Answer: B

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Question 15

In a desert e\cosystem, what is the primary role of the xerophyte plant?

A. To produce shade

B. To provide food for herbivores

Correct C. To conserve water

D. To regulate soil temperature

Correct Answer: C

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Question 16

In a desert e\cosystem, what is the primary mechanism by which plants regulate water loss through their leaves?

Correct A. Stomatal closure

B. Transpiration

C. Cuticular transpiration

D. Root pressure

Correct Answer: A

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Question 17

A species of bird has a unique mating ritual where the male presents the female with a specific type of food. What is the likely reason for this behavior?

Correct A. To attract a mate

B. To establish dominance

C. To provide nutrients for offspring

D. To signal the start of breeding season

Correct Answer: A

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Question 18

In a population of rabbits, what is the term for the process by which the frequency of a particular trait increases over time?

Correct A. Natural selection

B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: A

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Question 19

A cell is placed in a solution with a high concentration of salt. What is the likely effect on the cell's osmotic balance?

A. The cell will shrink due to water loss

Correct B. The cell will swell due to water gain

C. The cell's osmotic balance will remain unchanged

D. The cell will undergo apoptosis

Correct Answer: B

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Question 20

A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?

Correct A. To regulate the movement of materials in and out of the cell

B. To synthesize proteins

C. To store genetic information

D. To provide structural support

Correct Answer: A

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Question 21

The graph below represents the growth of a population of microorganisms over time. Which of the following best describes the type of growth depicted in the graph?

Correct A. Exponential growth

B. Logarithmic growth

C. Linear growth

D. Sigmoid growth

Correct Answer: A

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Question 22

A patient is diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. Which of the following is the most likely cause of this resis\tance?

Correct A. Horizontal gene transfer

B. Vertical gene transfer

C. Mutation

D. Genetic recombination

Correct Answer: A

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Question 23

A plant is placed in a controlled environment with a cons\tant temperature and humidity. The plant's growth is measured over time. Which of the following best describes the type of growth depicted in the graph?

A. Exponential growth

B. Logarithmic growth

Correct C. Linear growth

D. Sigmoid growth

Correct Answer: C

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Question 24

A patient is diagnosed with a viral infection. The virus is highly contagious and spreads quickly through the population. Which of the following is the most likely cause of this spread?

Correct A. Horizontal gene transfer

B. Vertical gene transfer

C. Mutation

D. Genetic recombination

Correct Answer: A

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Question 25

A plant is placed in a controlled environment with a cons\tant temperature and humidity. The plant's growth is measured over time. Which of the following best describes the type of growth depicted in the graph?

A. Exponential growth

B. Logarithmic growth

Correct C. Linear growth

D. Sigmoid growth

Correct Answer: C

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