Agriculture and food chains - Question Bank

1. What is the primary function of seeds in agriculture?
A) To provide fiber for clothing
B) To store energy for the plant's early growth
C) To attract pollinators
D) To release oxygen into the atmosphere
2. Which of the following is NOT a direct source of food for humans?
A) Wheat
B) Chicken
C) Sunlight
D) Milk
3. What is the term for the process where water vapor in the atmosphere cools and changes back into liquid water, forming clouds?
A) Evaporation
B) Precipitation
C) Condensation
D) Infiltration
4. Which environmental factor is crucial for photosynthesis to occur in plants?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Methane
5. In the context of food, what does 'fortification' mean?
A) Preserving food by drying
B) Adding nutrients to food that are not naturally present
C) Reducing the fat content of food
D) Cooking food at high temperatures
6. What is the term for the practice of growing crops and raising animals together on the same farm?
A) Monoculture
B) Specialized farming
C) Mixed farming
D) Subsistence farming
7. Which of the following is a key component of a balanced diet that provides essential vitamins and minerals?
A) Grains
B) Oils and fats
C) Fruits and vegetables
D) Sugars
8. What is the process by which plants release water vapor into the atmosphere through their leaves?
A) Photosynthesis
B) Respiration
C) Transpiration
D) Absorption
9. Which agricultural product is a major source of edible oil in India, often grown as a Rabi crop?
A) Groundnut
B) Soybean
C) Mustard
D) Sunflower
10. What is a 'trophic level' in ecology?
A) A type of soil
B) A position an organism occupies in a food chain
C) A specific type of plant
D) A measure of rainfall
11. Which of the following is a negative impact of using excessive chemical fertilizers?
A) Improved soil structure
B) Reduced pest resistance
C) Water pollution (eutrophication)
D) Increased crop yield in the short term
12. What is the primary role of roots in a plant?
A) To produce flowers
B) To absorb water and nutrients from the soil
C) To capture sunlight
D) To release oxygen
13. Which government scheme in India aims to improve agricultural productivity and farmer income through various initiatives?
A) MGNREGA
B) Pradhan Mantri Kisan Samman Nidhi (PM-KISAN)
C) Swachh Bharat Abhiyan
D) Ayushman Bharat
14. What is the term for the practice of raising livestock such as cattle, sheep, and goats for meat, milk, or wool?
A) Horticulture
B) Dairying
C) Animal husbandry
D) Fisheries
15. Which of the following is a fruit commonly grown in Tamil Nadu and used in various dishes?
A) Blueberry
B) Mango
C) Kiwi
D) Avocado
16. What is the main function of carbohydrates in an organism's diet?
A) To provide energy
B) To build and repair tissues
C) To regulate bodily functions
D) To transport vitamins
17. Which natural process helps to cycle nutrients like nitrogen and phosphorus through the ecosystem, making them available for producers?
A) Photosynthesis
B) Respiration
C) Decomposition
D) Evaporation
18. What are the primary building blocks of proteins, essential for growth and repair in animals?
A) Carbohydrates
B) Lipids
C) Amino acids
D) Vitamins
19. Which agricultural practice aims to conserve water by reducing evaporation from the soil surface?
A) Flood irrigation
B) Mulching
C) Deep tillage
D) Row planting
20. What is the role of earthworms in agricultural soil?
A) They are pests that damage roots.
B) They aerate the soil and improve its structure.
C) They consume beneficial bacteria.
D) They are producers.
21. Which of the following is a consequence of deforestation impacting food chains?
A) Increased availability of plant-based food
B) Loss of habitat for herbivores and carnivores
C) Reduced soil erosion
D) Higher biodiversity in the remaining forest
22. What is the term for the variety of life in a particular habitat or ecosystem, which is crucial for stable food webs?
A) Ecological succession
B) Biogeochemical cycle
C) Biodiversity
D) Habitat fragmentation
23. In a food chain, energy is transferred from one trophic level to the next. What is the typical efficiency of this energy transfer?
A) Approximately 1-2%
B) Approximately 10%
C) Approximately 50%
D) Approximately 90%
24. What is the process called when plants absorb water from the soil through their roots?
A) Evaporation
B) Condensation
C) Absorption
D) Transpiration
25. Which food is a primary source of protein for vegetarians?
A) Chicken
B) Fish
C) Pulses (like lentils and beans)
D) Eggs
26. What is 'green manure' in agriculture?
A) A type of synthetic fertilizer
B) Crops grown specifically to be plowed back into the soil
C) A natural pesticide
D) A method of water conservation
27. Which of these is a common method for controlling soil erosion in hilly areas?
A) Deep plowing
B) Contour farming
C) Monoculture planting
D) Leaving soil bare
28. What is the term for the cultivation of fish in controlled environments?
A) Sericulture
B) Apiculture
C) Aquaculture
D) Horticulture
29. What is 'crop yield' in agriculture?
A) The amount of land used for farming
B) The amount of water used for irrigation
C) The amount of produce harvested per unit area
D) The number of seeds planted per hectare
30. Which of the following is a major staple food crop in many parts of the world, providing carbohydrates?
A) Lentils
B) Rice
C) Tomatoes
D) Onions
31. What is the primary goal of food preservation techniques like drying, salting, and canning?
A) To increase nutritional value
B) To prevent spoilage and extend shelf life
C) To change the texture of food
D) To make food more palatable
32. Which type of agriculture focuses on minimizing environmental impact and promoting biodiversity?
A) Industrial agriculture
B) Organic farming
C) Hydroponics
D) Greenhouse cultivation
33. Pesticides are chemicals used in agriculture to:
A) Increase soil fertility
B) Control pests and diseases
C) Improve water retention
D) Promote plant growth
34. What is the process of supplying water to crops artificially?
A) Drainage
B) Erosion
C) Irrigation
D) Fertilization
35. Which nutrient is essential for plant growth and is often added to soil in the form of fertilizers?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Water vapor
36. What agricultural practice involves growing different crops in succession on the same land to improve soil health and reduce pests?
A) Monoculture
B) Crop rotation
C) Terracing
D) Irrigation
37. When energy flows from one trophic level to the next in a food chain, approximately how much energy is typically lost?
A) 10%
B) 50%
C) 90%
D) 100%
38. Which of the following are typically decomposers?
A) Algae and seaweed
B) Bacteria and fungi
C) Cows and sheep
D) Lions and tigers
39. What is the term for a network of interconnected food chains in an ecosystem?
A) Food web
B) Food pyramid
C) Ecological niche
D) Biotic community
40. In the food chain: Phytoplankton → Zooplankton → Small Fish → Shark, what is the role of Small Fish?
A) Producer
B) Primary Consumer
C) Secondary Consumer
D) Decomposer
41. What is the main source of energy for almost all ecosystems on Earth?
A) Geothermal heat
B) The Sun
C) Moonlight
D) Chemical energy from rocks
42. An omnivore is an organism that eats:
A) Only plants
B) Only animals
C) Both plants and animals
D) Only insects
43. Which of the following is an example of a tertiary consumer?
A) Deer
B) Wolf
C) Eagle (eating a rabbit)
D) Earthworm
44. What term describes organisms that can produce their own food using light energy?
A) Consumers
B) Decomposers
C) Producers
D) Omnivores
45. In the food chain: Grass → Grasshopper → Frog → Snake, which organism is the secondary consumer?
A) Grass
B) Grasshopper
C) Frog
D) Snake
46. What is the role of decomposers in an ecosystem?
A) Produce food from sunlight
B) Consume producers
C) Break down dead organic matter
D) Act as top predators
47. A carnivore is an organism that obtains energy by eating:
A) Plants
B) Decomposers
C) Other animals
D) Fungi
48. Which organism acts as a primary consumer in an aquatic food chain like a pond ecosystem?
A) Algae
B) Fish
C) Zooplankton
D) Heron
49. A herbivore is an animal that primarily eats:
A) Other animals
B) Plants
C) Insects
D) Fruits and seeds only
50. Which of the following is a producer in a typical terrestrial food chain?
A) Lion
B) Grass
C) Rabbit
D) Fungus
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