Plant and Animal Nutrition Practice Questions
WAEC (West Africa) · WAEC Biology · 144 free MCQs with instant results and detailed explanations.
144
Total
44
Easy
71
Medium
29
Hard
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Sample Questions from Plant and Animal Nutrition
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Q1
Easy
Which of the following processes involves the conversion of light energy into chemical energy in plants?
A.
Respiration
B.
Transpiration
C.
Photosynthesis
D.
Fermentation
Show Answer & Explanation
Correct Answer: C
Photosynthesis is the process by which plants convert light energy into chemical energy, primarily in the form of glucose. This occurs in the chloroplasts using chlorophyll.
Q2
Easy
What is the primary function of roots in plants?
A.
Photosynthesis
B.
Water and mineral absorption
C.
Seed production
D.
Pollination
Show Answer & Explanation
Correct Answer: B
The primary function of roots is to absorb water and minerals from the soil, which are essential for plant growth and development.
Q3
Easy
Which nutrient is essential for the synthesis of proteins in plants?
A.
Carbohydrates
B.
Lipids
C.
Nitrogen
D.
Calcium
Show Answer & Explanation
Correct Answer: C
Nitrogen is essential for the synthesis of amino acids, which are the building blocks of proteins in plants. Without adequate nitrogen, plants cannot produce adequate proteins.
Q4
Medium
Which of the following nutrients is primarily responsible for the growth and development of plant tissues?
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Calcium
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Correct Answer: A
Nitrogen is a key component of amino acids, proteins, and nucleic acids, which are essential for cell growth and development in plants.
Q5
Medium
In a certain experiment, a group of plants was treated with a fertilizer high in phosphorous. What immediate effect would you expect to observe?
A.
Increased leaf size
B.
Enhanced root development
C.
Faster flower production
D.
Improved fruit quality
Show Answer & Explanation
Correct Answer: B
Phosphorus is essential for root development and helps in the establishment of a strong root system, which is critical for nutrient uptake.
Q6
Medium
Which of the following processes is primarily responsible for the uptake of water and minerals from the soil in plants?
A.
Photosynthesis
B.
Transpiration
C.
Osmosis
D.
Respiration
Show Answer & Explanation
Correct Answer: C
Osmosis is the movement of water through the plant roots into the cells, facilitating the uptake of minerals dissolved in water.
Q7
Medium
If an animal is fed solely on carbohydrates, which of the following deficiencies is most likely to occur?
A.
Vitamin A deficiency
B.
Protein deficiency
C.
Iron deficiency
D.
Calcium deficiency
Show Answer & Explanation
Correct Answer: B
A diet consisting only of carbohydrates lacks essential amino acids needed for protein synthesis, leading to protein deficiency.
Q8
Hard
Which of the following statements best describes the role of chlorophyll in photosynthesis?
A.
Chlorophyll absorbs light energy, which is used to convert carbon dioxide and water into glucose.
B.
Chlorophyll serves as a structural component of plant cells, providing shape.
C.
Chlorophyll is responsible for transporting nutrients throughout the plant.
D.
Chlorophyll helps in the respiration process of plants.
Show Answer & Explanation
Correct Answer: A
Chlorophyll plays a crucial role in photosynthesis by absorbing light energy, which is essential for the conversion of carbon dioxide and water into glucose. This process is fundamental for plant growth and energy production.
Q9
Hard
In a controlled experiment, a group of plants received different concentrations of nitrogen fertilizer. Which measure would best indicate the effectiveness of these treatments on plant growth?
A.
The amount of water used for each plant.
B.
The height of the plants measured after a specific growth period.
C.
The type of soil used for planting.
D.
The amount of sunlight each plant received.
Show Answer & Explanation
Correct Answer: B
The height of the plants measured after a specific growth period provides direct evidence of how effective the nitrogen fertilizer is in promoting growth. This measure reflects the impact of the fertilizer on the plant's development.
Q10
Hard
Which of the following is a primary characteristic of heterotrophic nutrition in animals?
A.
Production of glucose through photosynthesis
B.
Absorption of organic nutrients from the environment
C.
Synthesis of proteins from amino acids
D.
Utilization of sunlight for energy
Show Answer & Explanation
Correct Answer: B
Heterotrophic nutrition involves organisms that cannot produce their own food and instead absorb organic nutrients from their environment, making option B the correct choice.
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Plant and Animal Nutrition — WAEC (West Africa) WAEC Biology Practice Questions Online
This page contains 144 practice MCQs for the chapter Plant and Animal Nutrition in WAEC (West Africa) WAEC Biology. The questions are organized by difficulty — 44 easy, 71 medium, 29 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.