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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. Learn about ruminants, cud, rumination, cellulose digestion, grass-eating animals, and the special digestive system of cows and buffaloes.
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Chapter Information
Subject: Science
Class: 7
Chapter: Nutrition in Animals
Question Type: Multiple Choice Questions (MCQs)
Practice Set: 13
Difficulty Level: Difficult
Based On: NCERT Syllabus
Introduction
Animals have different digestive systems depending on the type of food they consume. Animals such as cows, buffaloes, goats, and deer mainly feed on grass and other plant materials. These animals are called ruminants.
Ruminants have a specialised digestive system that allows them to digest plant material containing cellulose efficiently. They swallow grass quickly and later bring partially digested food back into the mouth, where it is chewed again. This process is called rumination.
In this Practice Set 13, students will practise important and application-based MCQs related to ruminants, cud, rumination, cellulose digestion, and microorganisms.
What You Will Learn
✔ Meaning of ruminants
✔ Process of rumination
✔ Meaning of cud
✔ Importance of chewing cud
✔ Digestion of cellulose
✔ Role of microorganisms in ruminants
✔ Special features of ruminant digestion
Why This Topic Is Important
Ruminants have a unique way of processing plant food. Their digestive system allows them to obtain nutrients from cellulose-rich food that many animals cannot digest efficiently.
Understanding rumination and the role of microorganisms helps students explain why animals such as cows and buffaloes can survive mainly on grass and other plant materials.
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 of the following animals is a ruminant?
A) Lion
B) Cow
C) Cat
D) Eagle
Answer:
B) Cow
Useful Detail
A cow is a ruminant animal. Other examples include buffaloes, goats, sheep, and deer.
Ruminants mainly feed on plant materials such as grass. Their digestive system is adapted to process cellulose-rich food.
They can bring partially digested food back into the mouth and chew it again. This process is known as rumination.
Correct Answer: B) Cow
Q2. What is the partially digested food brought back from the stomach to the mouth in ruminants called?
A) Saliva
B) Cud
C) Bile
D) Chyme
Answer:
B) Cud
Useful Detail
Ruminants often swallow grass quickly after collecting it in the mouth.
Later, the partially digested food is brought back into the mouth in the form of a soft mass called cud.
The animal then chews the cud thoroughly before swallowing it again. This process makes the plant material easier to digest.
Correct Answer: B) Cud
Q3. Why do ruminants chew their cud?
A) To remove water from food
B) To break plant material into smaller pieces and make digestion easier
C) To produce bile
D) To absorb nutrients directly through the mouth
Answer:
B) To break plant material into smaller pieces and make digestion easier
Useful Detail
Plant food contains a large amount of cellulose, which is difficult to digest.
When a ruminant brings cud back into its mouth and chews it thoroughly, the plant material is broken into smaller pieces and mixed with saliva.
This increases the accessibility of the food to microorganisms in the digestive system and supports more efficient digestion.
Correct Answer: B) To break plant material into smaller pieces and make digestion easier
Q4. Which organisms help ruminants digest cellulose?
A) Microorganisms
B) Birds
C) Insects only
D) Fish
Answer:
A) Microorganisms
Useful Detail
The digestive system of ruminants contains microorganisms that help break down cellulose present in plant food.
These microorganisms are important because ruminants depend heavily on grass and other plant materials.
The relationship between the animal and these microorganisms enables the ruminant to obtain nutrients from cellulose-rich food.
Correct Answer: A) Microorganisms
Q5. A cow eats grass quickly and later brings the partially digested food back into its mouth to chew it again. Which process is being described?
A) Absorption
B) Rumination
C) Egestion
D) Assimilation
Answer:
B) Rumination
Useful Detail
The process in which a ruminant brings partially digested food back into the mouth and chews it again is called rumination.
During rumination, the animal thoroughly chews the cud. This helps break down the plant material and prepares it for further digestion.
Rumination is an important adaptation of ruminants for obtaining nutrients from plant-based food.
Correct Answer: B) Rumination
Important Formulas & Concepts
Science Chapter 2 does not contain mathematical formulas. Important scientific concepts are given below.
1. Ruminants
Animals that mainly feed on grass and other plant materials and can bring partially digested food back into the mouth for further chewing are called ruminants.
2. Cud
The partially digested food that is brought back into the mouth of a ruminant is called cud.
3. Rumination
The process of bringing cud back into the mouth and chewing it again is called rumination.
4. Cellulose
Cellulose is an important component of plant cell walls and is present in large amounts in grass and other plant foods.
5. Microorganisms
Microorganisms in the digestive system of ruminants help break down cellulose.
6. Importance of Chewing Cud
Repeated chewing breaks plant material into smaller pieces and makes it easier for microorganisms to act on it.
7. Examples of Ruminants
Examples include:
Cow, buffalo, goat, sheep, and deer.
Related Practice Questions
Q1. What are ruminants?
Q2. What is cud?
Q3. What is rumination?
Q4. Why is cellulose difficult to digest?
Q5. How do microorganisms help ruminants?
Mini Quiz Challenge
Try answering these questions within 60 seconds.
Q1. Which animal is a ruminant?
A) Tiger
B) Cow
C) Dog
D) Eagle
Q2. Partially digested food brought back to the mouth is called:
A) Cud
B) Bile
C) Saliva
D) Faeces
Q3. The process of chewing cud is called:
A) Absorption
B) Rumination
C) Assimilation
D) Egestion
Q4. Ruminants mainly feed on:
A) Grass and plant materials
B) Meat
C) Fish
D) Insects
Q5. Cellulose digestion in ruminants is helped by:
A) Teeth only
B) Microorganisms
C) Blood cells
D) Saliva only
Exam Tips
✔ Remember the meaning of ruminant.
✔ Learn the difference between cud and rumination.
✔ Cud is partially digested food brought back into the mouth.
✔ Rumination is the process of chewing cud again.
✔ Remember that grass contains a large amount of cellulose.
✔ Microorganisms help ruminants digest cellulose.
✔ Learn examples such as cow, buffalo, goat, sheep, and deer.
✔ Do not confuse rumination with egestion.
Quick Revision Notes
✔ Ruminants: Animals adapted to digest plant-rich food through a specialised digestive process.
✔ Cud: Partially digested food brought back into the mouth.
✔ Rumination: Chewing the cud again.
✔ Cellulose: A major component of plant cell walls.
✔ Microorganisms: Help ruminants digest cellulose.
✔ Examples: Cow, buffalo, goat, sheep, and deer.
✔ Main food: Grass and other plant materials.
Common Mistakes Students Make
❌ Thinking cud means undigested food that is being removed from the body.
❌ Confusing rumination with egestion.
❌ Thinking all animals can digest cellulose efficiently.
❌ Forgetting the role of microorganisms in ruminant digestion.
❌ Thinking that rumination means swallowing food only once.
❌ Confusing a ruminant’s cud with faeces.
Key Takeaways
✔ Ruminants are mainly plant-eating animals.
✔ Cows and buffaloes are common examples of ruminants.
✔ Ruminants can bring partially digested food back into their mouths.
✔ The partially digested food is called cud.
✔ Chewing cud again is called rumination.
✔ Microorganisms help digest cellulose.
✔ Rumination makes plant food easier to digest.
FAQs
Q. What is a ruminant?
Answer:
A ruminant is an animal that mainly feeds on plant material and can bring partially digested food back into the mouth for further chewing.
Q. What is cud?
Answer:
Cud is the partially digested food that a ruminant brings back into its mouth and chews again.
Q. What is rumination?
Answer:
Rumination is the process of bringing cud back into the mouth and chewing it thoroughly before swallowing it again.
Q. Why can cows digest grass efficiently?
Answer:
Cows have a specialised digestive system containing microorganisms that help break down cellulose present in grass and other plant materials.
Q. Name some ruminants.
Answer:
Cow, buffalo, goat, sheep, and deer are examples of ruminants.
Conclusion
These Class 7 Science Chapter 2 Nutrition in Animals MCQ Questions with Answers and Useful Details – focus on ruminants, cud, rumination, cellulose, and the role of microorganisms in digestion.
Ruminants have special adaptations that allow them to obtain nutrients from plant-based food. Understanding these adaptations is an important part of Nutrition in Animals.
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