Vidaara.orgClass 7 · Mathematics
CodeVID-M7-WS
Nutrition in Plants — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
25 × 1 = 25 marks
1.
The process of taking in food and using it for energy, growth, and repair is called:
- A.Respiration
- B.Nutrition
- C.Digestion
- D.Excretion
2.
Organisms that make their own food are said to be:
- A.Heterotrophic
- B.Autotrophic
- C.Parasitic
- D.Saprophytic
3.
Green plants are called ______ in a food chain.
- A.Consumers
- B.Producers
- C.Decomposers
- D.Predators
4.
Which of the following follows the heterotrophic mode of nutrition?
- A.Grass
- B.A green tree
- C.A deer
- D.Algae
5.
The ultimate source of energy for almost all food chains is the:
- A.Soil
- B.Sun
- C.Wind
- D.Water
6.
The process by which green plants make their own food is called:
- A.Respiration
- B.Photosynthesis
- C.Digestion
- D.Transpiration
7.
The raw materials needed for photosynthesis are:
- A.Oxygen and glucose
- B.Carbon dioxide and water
- C.Nitrogen and starch
- D.Oxygen and water
8.
The green pigment that captures sunlight is:
- A.Haemoglobin
- B.Chlorophyll
- C.Starch
- D.Glucose
9.
The gas released as a by-product of photosynthesis is:
- A.Carbon dioxide
- B.Nitrogen
- C.Oxygen
- D.Hydrogen
10.
A leaf that has made food turns blue-black when tested with:
- A.Litmus
- B.Iodine solution
- C.Lime water
- D.Vinegar
11.
Photosynthesis takes place mainly in the plant's:
- A.Roots
- B.Leaves
- C.Stem
- D.Flowers
12.
The tiny pores on a leaf through which gases pass in and out are called:
- A.Veins
- B.Stomata
- C.Roots
- D.Petals
13.
The opening and closing of a stoma is controlled by:
- A.Veins
- B.Guard cells
- C.Chlorophyll
- D.Roots
14.
Which of the following is NOT a condition needed for photosynthesis?
- A.Sunlight
- B.Chlorophyll
- C.Carbon dioxide
- D.Darkness
15.
The leaf is often called the plant's:
- A.Storehouse
- B.Food factory
- C.Pump
- D.Skeleton
16.
Cuscuta (Amarbel) obtains its food by living as a:
- A.Saprophyte
- B.Parasite
- C.Symbiont
- D.Producer
17.
A pitcher plant traps insects mainly to obtain:
- A.Sunlight
- B.Nitrogen
- C.Water
- D.Oxygen
18.
Plants and fungi that feed on dead and decaying matter are called:
- A.Parasites
- B.Saprophytes
- C.Autotrophs
- D.Insectivores
19.
In a lichen, an alga and a fungus live together so that:
- A.Only the alga benefits
- B.Both benefit
- C.Only the fungus benefits
- D.Neither benefits
20.
Cuscuta cannot make its own food because it lacks:
- A.Roots
- B.Chlorophyll
- C.Water
- D.A host
21.
Which mineral nutrient, needed to make proteins, is especially important for plants?
- A.Oxygen
- B.Nitrogen
- C.Carbon
- D.Chlorine
22.
Plants absorb water and minerals from the soil through their:
- A.Leaves
- B.Roots
- C.Flowers
- D.Stomata
23.
The bacteria that fix atmospheric nitrogen in the root nodules of legumes are:
- A.Rhizobium
- B.Lactobacillus
- C.Amoeba
- D.Chlorophyll
24.
Plants cannot directly use nitrogen from the:
- A.Soil
- B.Air
- C.Roots
- D.Nodules
25.
Growing a leguminous crop between other crops to restore soil nitrogen is part of:
- A.Photosynthesis
- B.Crop rotation
- C.Transpiration
- D.Germination
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Nutrition
- (B) Autotrophic
- (B) Producers
- (C) A deer
- (B) Sun
- (B) Photosynthesis
- (B) Carbon dioxide and water
- (B) Chlorophyll
- (C) Oxygen
- (B) Iodine solution
- (B) Leaves
- (B) Stomata
- (B) Guard cells
- (D) Darkness
- (B) Food factory
- (B) Parasite
- (B) Nitrogen
- (B) Saprophytes
- (B) Both benefit
- (B) Chlorophyll
- (B) Nitrogen
- (B) Roots
- (A) Rhizobium
- (B) Air
- (B) Crop rotation
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