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Practice Class 7 Science Chapter 2 Nutrition in Animals MCQ Questions with Answers and Useful Details based on the NCERT syllabus. Test your knowledge of the human digestive system, digestion in Amoeba, ruminants, absorption, assimilation, egestion, and important digestive organs.
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Chapter Information
Subject: Science
Class: 7
Chapter: Nutrition in Animals
Question Type: Multiple Choice Questions (MCQs)
Practice Set: 14
Difficulty Level: Difficult
Based On: NCERT Syllabus
Introduction
Nutrition in animals involves a series of processes through which food is taken into the body, digested, absorbed, utilised, and finally undigested material is removed.
Different animals have different methods of obtaining and digesting food. Humans have a specialised alimentary canal, while organisms such as Amoeba digest food inside a food vacuole. Ruminants have specialised adaptations that help them digest plant material rich in cellulose.
This Practice Set 14 brings together important conceptual questions from different parts of Nutrition in Animals, including human digestion, Amoeba, absorption, ruminants, and digestive organs.
What You Will Learn
✔ Human digestive system
✔ Functions of digestive organs
✔ Digestion in Amoeba
✔ Absorption and assimilation
✔ Egestion
✔ Ruminant digestion
✔ Role of microorganisms
✔ Comparison of nutrition in different animals
Why This Topic Is Important
Nutrition in Animals contains several interconnected concepts. Understanding how different organisms obtain and process food helps students develop a broader understanding of life processes.
These concepts are especially useful for conceptual MCQs, diagram-based questions, and school examinations.
Exam Relevance
These questions are useful for:
✔ CBSE School Exams
✔ State Board Exams
✔ Unit Tests
✔ Half-Yearly Exams
✔ Annual Exams
✔ NCERT-Based Practice
✔ Science Revision
Q1. Which pair is correctly matched?
A) Incisors — Grinding food
B) Canines — Tearing food
C) Villi — Producing bile
D) Rectum — Producing saliva
Answer:
B) Canines — Tearing food
Useful Detail
Different parts of the digestive system have specialised functions.
- Incisors mainly cut and bite food.
- Canines mainly tear food.
- Villi increase the surface area for absorption in the small intestine.
- Rectum temporarily stores faeces.
Therefore, the correctly matched pair is Canines — Tearing food.
Correct Answer: B) Canines — Tearing food
Q2. A student observes an organism engulfing food with temporary projections and digesting it inside a food vacuole. Which organism is most likely being observed?
A) Cow
B) Human
C) Amoeba
D) Earthworm
Answer:
C) Amoeba
Useful Detail
Amoeba is a unicellular organism that captures food using temporary projections called pseudopodia.
The pseudopodia surround and engulf the food particle. The food is then enclosed inside a food vacuole, where digestion occurs.
After digestion, useful nutrients are absorbed into the cytoplasm and the undigested material is eventually expelled.
Correct Answer: C) Amoeba
Q3. Which sequence correctly shows what happens to food after it is digested in the small intestine?
A) It is immediately egested.
B) Digested nutrients are absorbed and then utilised by the body.
C) It returns to the mouth for chewing.
D) It enters the large intestine without absorption.
Answer:
B) Digested nutrients are absorbed and then utilised by the body.
Useful Detail
The small intestine is the major site where digestion is completed and nutrients are absorbed.
The digested nutrients pass through the intestinal wall into the blood. The blood transports them to different parts of the body, where they are used for energy, growth, repair, and other functions.
This utilisation of absorbed nutrients is called assimilation.
Correct Answer: B) Digested nutrients are absorbed and then utilised by the body.
Q4. Which statement best explains why ruminants can obtain nutrients from grass?
A) They do not need to digest plant food.
B) Their digestive system contains microorganisms that help break down cellulose.
C) They absorb grass directly through their teeth.
D) Their stomach converts cellulose into saliva.
Answer:
B) Their digestive system contains microorganisms that help break down cellulose.
Useful Detail
Grass contains a large amount of cellulose, a substance that is difficult for many animals to digest.
Ruminants such as cows and buffaloes have microorganisms in their digestive system that help break down cellulose.
Their process of rumination also allows plant material to be chewed thoroughly, making it easier to digest.
Correct Answer: B) Their digestive system contains microorganisms that help break down cellulose.
Q5. Which statement correctly distinguishes digestion from absorption?
A) Digestion means removal of food, while absorption means chewing.
B) Digestion breaks complex food into simpler substances, while absorption transfers digested nutrients into the blood.
C) Digestion and absorption are exactly the same process.
D) Digestion occurs only in the large intestine, while absorption occurs only in the stomach.
Answer:
B) Digestion breaks complex food into simpler substances, while absorption transfers digested nutrients into the blood.
Useful Detail
Digestion and absorption are two different stages of nutrition.
During digestion, complex food substances are broken down into simpler substances.
During absorption, these digested nutrients pass through the wall of the small intestine and enter the blood.
Thus, digestion prepares food for absorption, while absorption makes the digested nutrients available to the body.
Correct Answer: B) Digestion breaks complex food into simpler substances, while absorption transfers digested nutrients into the blood.
Important Formulas & Concepts
Science Chapter 2 does not contain mathematical formulas. Important concepts are given below.
1. Digestion
Complex food substances are broken down into simpler substances.
2. Absorption
Digested nutrients pass through the intestinal wall and enter the blood.
3. Assimilation
The absorbed nutrients are utilised by the body.
4. Egestion
Undigested food is removed from the body.
5. Amoeba
Amoeba captures food using pseudopodia and digests it inside a food vacuole.
6. Ruminants
Ruminants such as cows and buffaloes have specialised digestion that helps them process cellulose-rich plant food.
7. Pseudopodia
Temporary projections used by Amoeba for movement and capturing food.
8. Villi
Finger-like projections in the small intestine that increase the surface area for absorption.
Related Practice Questions
Q1. Which teeth help in grinding food?
Q2. What is the function of pseudopodia?
Q3. What is the role of villi?
Q4. Why do ruminants chew cud?
Q5. What is the difference between assimilation and egestion?
Mini Quiz Challenge
Try answering these questions within 60 seconds.
Q1. Which structure helps Amoeba capture food?
A) Villi
B) Pseudopodia
C) Incisors
D) Canines
Q2. Which organ is mainly responsible for nutrient absorption?
A) Small intestine
B) Oesophagus
C) Rectum
D) Mouth
Q3. Which process removes undigested food?
A) Absorption
B) Assimilation
C) Egestion
D) Digestion
Q4. Which animal is a ruminant?
A) Lion
B) Cow
C) Tiger
D) Eagle
Q5. Which structure increases the absorptive surface area of the small intestine?
A) Villi
B) Canines
C) Pseudopodia
D) Incisors
Exam Tips
✔ Learn the functions of each major digestive organ.
✔ Remember the difference between digestion, absorption, assimilation, and egestion.
✔ Pseudopodia are associated with Amoeba.
✔ Food vacuole is the site of digestion in Amoeba.
✔ Villi help in absorption.
✔ Ruminants use rumination and microorganisms to digest plant material.
✔ Revise diagrams of the human digestive system and nutrition in Amoeba.
✔ Always read conceptual MCQ options carefully.
Quick Revision Notes
✔ Digestion: Breakdown of complex food.
✔ Absorption: Entry of digested nutrients into blood.
✔ Assimilation: Utilisation of absorbed nutrients.
✔ Egestion: Removal of undigested food.
✔ Amoeba: Uses pseudopodia to capture food.
✔ Food vacuole: Site of digestion in Amoeba.
✔ Ruminants: Animals adapted to digest plant-rich food.
✔ Cud: Partially digested food brought back to the mouth.
✔ Villi: Increase the surface area for absorption.
Common Mistakes Students Make
❌ Confusing absorption with assimilation.
❌ Thinking that Amoeba has a stomach.
❌ Confusing pseudopodia with villi.
❌ Thinking that ruminants digest cellulose without microorganisms.
❌ Confusing cud with faeces.
❌ Thinking that the large intestine absorbs most nutrients.
❌ Forgetting that digestion begins in the mouth.
Key Takeaways
✔ Animals have different methods of nutrition.
✔ Humans have a specialised digestive system.
✔ Amoeba uses pseudopodia and food vacuoles for nutrition.
✔ Digestion converts complex food into simpler substances.
✔ Absorption transfers digested nutrients into the blood.
✔ Assimilation involves the utilisation of nutrients.
✔ Ruminants use rumination and microorganisms to digest plant material.
✔ Villi help the small intestine absorb nutrients efficiently.
FAQs
Q. How does Amoeba obtain food?
Answer:
Amoeba uses pseudopodia to surround and engulf food. The food is then enclosed in a food vacuole where digestion takes place.
Q. What is the function of villi?
Answer:
Villi increase the surface area of the small intestine and help in efficient absorption of digested nutrients.
Q. What is rumination?
Answer:
Rumination is the process by which a ruminant brings partially digested food, called cud, back into its mouth and chews it again.
Q. What is assimilation?
Answer:
Assimilation is the utilisation of absorbed nutrients by the body for energy, growth, repair, and other life processes.
Q. What is egestion?
Answer:
Egestion is the removal of undigested food from the digestive tract.
Conclusion
These Class 7 Science Chapter 2 Nutrition in Animals MCQ Questions with Answers and Useful Details – Practice Set 14 provide comprehensive practice across major concepts of the chapter.
The questions cover human digestion, Amoeba, absorption, assimilation, egestion, ruminants, pseudopodia, food vacuoles, microorganisms, and villi.
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