Agriculture science WAEC exam questions and answers
Here are 20 agricultural science WAEC exam questions with options and answers:
Question: What is the primary function of chlorophyll in plants?
Options:
A) Absorption of carbon dioxide
B) Absorption of sunlight
C) Absorption of water
D) Absorption of nutrients
Answer: B) Absorption of sunlight
Question: Which of the following is a warm-season crop?
Options:
A) Wheat
B) Rice
C) Maize
D) Barley
Answer: C) Maize
Question: What is the process of breaking down organic matter into compost with the help of microorganisms called?
Options:
A) Photosynthesis
B) Fermentation
C) Decomposition
D) Transpiration
Answer: C) Decomposition
Question: Which of the following is a non-renewable resource used in agriculture?
Options:
A) Water
B) Soil
C) Fertilizer
D) Sunlight
Answer: C) Fertilizer
Question: What is the recommended pH range for most crops to grow well in soil?
Options:
A) pH 2-3
B) pH 7-8
C) pH 5.5-6.5
D) pH 9-10
Answer: C) pH 5.5-6.5
Question: Which gas is produced during the process of nitrogen fixation in leguminous plants?
Options:
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Ammonia
Answer: D) Ammonia
Question: Which of the following is a greenhouse gas that contributes to climate change and is released during rice cultivation in flooded fields?
Options:
A) Oxygen
B) Carbon dioxide
C) Methane
D) Nitrous oxide
Answer: C) Methane
Question: What is the term for the practice of rotating different crops in the same field to improve soil fertility and reduce pests and diseases?
Options:
A) Monoculture
B) Polyculture
C) Crop rotation
D) Mixed cropping
Answer: C) Crop rotation
Question: Which of the following is a parasitic weed that attaches to the roots of host plants to obtain nutrients?
Options:
A) Tomato
B) Potato
C) Striga
D) Wheat
Answer: C) Striga
Question: What is the process of separating grains from the chaff by wind or mechanical means?
Options:
A) Threshing
B) Harvesting
C) Sowing
D) Irrigation
Answer: A) Threshing
Question: Which of the following is a micronutrient essential for plant growth?
Options:
A) Nitrogen
B) Phosphorus
C) Potassium
D) Zinc
Answer: D) Zinc
Question: What is the most widely grown cereal crop in the world?
Options:
A) Rice
B) Wheat
C) Barley
D) Oats
Answer: B) Wheat
Question: Which of the following irrigation methods delivers water directly to the root zone of plants?
Options:
A) Drip irrigation
B) Flood irrigation
C) Furrow irrigation
D) Sprinkler irrigation
Answer: A) Drip irrigation
Question: In agriculture, what does the acronym GMO stand for?
Options:
A) General Management Order
B) Genetically Modified Organism
C) Greenhouse Microorganism Operation
D) Growth and Maintenance Objective
Answer: B) Genetically Modified Organism
Question: What is the term for the process of bees transferring pollen from one flower to another, aiding in plant reproduction?
Options:
A) Fertilization
B) Germination
C) Pollination
D) Photosynthesis
Answer: C) Pollination
Question: Which of the following is a common method of weed control in agriculture that involves cutting or uprooting weeds?
Options:
A) Herbicide application
B) Crop rotation
C) Weeding
D) Fertilization
Answer: C) Weeding
Question: Which nutrient is often referred to as "the king of fertilizers" and is crucial for plant growth and flowering?
Options:
A) Nitrogen
B) Phosphorus
C) Potassium
D) Calcium
Answer: B) Phosphorus
Question: What is the primary source of energy for photosynthesis in plants?
Options:
A) Oxygen
B) Water
C) Carbon dioxide
D) Sunlight
Answer: D) Sunlight
Question: What is the term for the practice of breeding and raising fish in controlled environments for human consumption?
Options:
A) Apiculture
B) Aquaculture
C) Sericulture
D) Horticulture
Answer: B) Aquaculture
Question: Which part of the plant is responsible for absorbing water and nutrients from the soil?
Options:
A) Leaves
B) Flowers
C) Roots
D) Stems
Answer: C) Roots.
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