Vidaara.orgClass 8 · Mathematics
CodeVID-M8-WS
Nutrition in Plants and Animals — 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)
30 × 1 = 30 marks
1.
Organisms that make their own food are called:
- A.Heterotrophs
- B.Autotrophs
- C.Parasites
- D.Saprophytes
2.
Green plants make their food mainly by:
- A.Chemosynthesis
- B.Photosynthesis
- C.Holozoic feeding
- D.Parasitism
3.
Feeding on dead and decaying matter is called ______ nutrition.
- A.Holozoic
- B.Saprophytic
- C.Parasitic
- D.Autotrophic
4.
A tapeworm living inside a host shows ______ nutrition.
- A.Holozoic
- B.Saprophytic
- C.Parasitic
- D.Autotrophic
5.
The mode of nutrition in which an animal takes in and digests food is:
- A.Holozoic
- B.Saprophytic
- C.Parasitic
- D.Chemosynthetic
6.
Photosynthesis takes place mainly inside which structures of the leaf cells?
- A.Mitochondria
- B.Chloroplasts
- C.Vacuoles
- D.Nuclei
7.
The gas released as a by-product of photosynthesis is:
- A.Carbon dioxide
- B.Oxygen
- C.Nitrogen
- D.Hydrogen
8.
Which stage of photosynthesis traps light energy and splits water?
- A.Light reactions
- B.Dark reactions
- C.Calvin cycle
- D.Respiration
9.
The dark reactions (Calvin cycle) mainly use carbon dioxide to build:
- A.Oxygen
- B.Glucose
- C.Water
- D.Chlorophyll
10.
Which of these is a factor affecting the rate of photosynthesis?
- A.Light intensity
- B.Carbon dioxide level
- C.Temperature
- D.All of these
11.
Plants absorb minerals from the soil mainly through their:
- A.Leaves
- B.Roots
- C.Flowers
- D.Stem only
12.
Minerals needed by plants in large amounts are called:
- A.Micronutrients
- B.Macronutrients
- C.Vitamins
- D.Pigments
13.
Which mineral is needed for making proteins and chlorophyll?
- A.Nitrogen
- B.Iron
- C.Boron
- D.Zinc
14.
Yellowing of leaves and stunted growth usually indicate a deficiency of:
- A.Potassium
- B.Nitrogen
- C.Calcium
- D.Sulphur
15.
Iron, zinc, and copper, needed only in tiny amounts, are examples of:
- A.Macronutrients
- B.Micronutrients
- C.Carbohydrates
- D.Proteins
16.
The breaking down of complex food into simple, soluble substances is called:
- A.Absorption
- B.Digestion
- C.Egestion
- D.Respiration
17.
The muscular tube that carries food from the mouth to the stomach is the:
- A.Oesophagus
- B.Trachea
- C.Small intestine
- D.Liver
18.
Most digestion and absorption of food take place in the:
- A.Stomach
- B.Small intestine
- C.Large intestine
- D.Mouth
19.
Which organ produces bile that helps in the digestion of fats?
- A.Pancreas
- B.Liver
- C.Stomach
- D.Kidney
20.
The main function of the large intestine is to:
- A.Digest proteins
- B.Absorb water from undigested food
- C.Make bile
- D.Chew food
21.
A substance that speeds up a chemical reaction in the body without being used up is a(n):
- A.Enzyme
- B.Mineral
- C.Vitamin
- D.Hormone
22.
Salivary amylase, found in saliva, begins the digestion of:
- A.Proteins
- B.Fats
- C.Starch
- D.Water
23.
The enzyme pepsin works in the stomach and digests:
- A.Starch
- B.Proteins
- C.Fats
- D.Sugars
24.
Fats are digested into fatty acids and glycerol by the enzyme:
- A.Amylase
- B.Pepsin
- C.Lipase
- D.Trypsin
25.
The final product of protein digestion is:
- A.Glucose
- B.Amino acids
- C.Fatty acids
- D.Starch
26.
The passage of digested nutrients through the intestine wall into the blood is called:
- A.Digestion
- B.Absorption
- C.Egestion
- D.Chewing
27.
The tiny finger-like projections on the inner wall of the small intestine are called:
- A.Cilia
- B.Villi
- C.Nephrons
- D.Alveoli
28.
Villi help absorption mainly because they:
- A.Make enzymes
- B.Increase the surface area
- C.Store waste
- D.Produce bile
29.
Glucose and amino acids are absorbed from the villi mainly into the:
- A.Lymph vessel
- B.Blood capillaries
- C.Stomach
- D.Liver duct
30.
The use of absorbed nutrients by body cells for energy, growth, and repair is called:
- A.Absorption
- B.Assimilation
- C.Digestion
- D.Egestion
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Autotrophs
- (B) Photosynthesis
- (B) Saprophytic
- (C) Parasitic
- (A) Holozoic
- (B) Chloroplasts
- (B) Oxygen
- (A) Light reactions
- (B) Glucose
- (D) All of these
- (B) Roots
- (B) Macronutrients
- (A) Nitrogen
- (B) Nitrogen
- (B) Micronutrients
- (B) Digestion
- (A) Oesophagus
- (B) Small intestine
- (B) Liver
- (B) Absorb water from undigested food
- (A) Enzyme
- (C) Starch
- (B) Proteins
- (C) Lipase
- (B) Amino acids
- (B) Absorption
- (B) Villi
- (B) Increase the surface area
- (B) Blood capillaries
- (B) Assimilation
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