Chapter 2 Nutrition in Animals

Board
CBSE
Textbook
NCERT
Class
Class 7
Subject
Science
Chapter
Chapter 2 Nutrition in Animals
Chapter Name
Chapter 2 – Nutrition in Animals
Category
Worksheets

Worksheet for class 7 Science Chapter 2 Nutrition in Animals

This page consists of MCQ-based questions with detailed solutions for Chapter 2 Nutrition in Animals of class 7 science prepared by HT experts. Check out all the worksheets for class 7 science. Do solve NCERT textbook with the help of NCERT solutions for class 7 science.

1. Absorption is maximum in small intestine because of the presence of

(a) villi.

(b) gastric glands.

(d) enzymes.

Answer:

(a)

villi

Explanation: The inner walls of the small intestine have thousands of finger-like outgrowths called villi. These villi increase the surface area for absorption of the digested food.

2. Mastication means

(a) digesting.

(b) absorbing.

(d) chewing.

Answer:

(d)

Chewing

Explanation: Mastication/chewing is the process of biting and grinding food by teeth in the mouth so it becomes soft enough to swallow. This physical breakdown is the first step of digestion.

3. In the mouth, food is formed into

(a) chyme.

(b) bolus.

(d) droplets.

Answer:

(b)

Bolus

Explanation: Bolus is a mass of chewed food mixed with salivary secretion. It is propelled into the oesophagus during the swallowing phase of digestion. Once a bolus reaches the stomach, digestion begins.

4. Bile is secreted by

(a) liver.

(b) gall bladder.

(d) stomach.

Answer:

(a)

liver

Explanation: Liver secretes bile juice that is stored in gall bladder. Bile plays an important role in the digestion of fats.

Questions and answers for CBSE class 7 science Chapter 2 Nutrition in Animals Set-1

5. The part of the digestive system where no digestion occurs is

(a) mouth.

(b) oesophagus.

(d) small intestine.

Answer:

(b)

Oesophagus

Explanation: Oesophagus is the tube that carries food from the pharynx to the stomach. It is the part where no digestion takes place.

6. The process in which digested food is transformed into living tissues is known as

(a) absorption.

(b) photosynthesis.

(d) egestion.

Answer:

(c)

Assimilation

Explanation: Assimilation is the process of absorbing nutrients into the body after digestion. The absorbed food is then used for growth and repair of tissues.

7. Digestion is the process of

(a) absorbing nutrients into the body.

(b) preparing food as carbohydrate using carbon dioxide and water.

(d) breakdown of complex food substances into simpler assimilable form .

Answer:

(d)

Breakdown of complex food substances into simpler assimilable form .

Explanation: Digestion is the process by which larger molecules of food substance are broken down mechanically and chemically into smaller molecules that can be absorbed.

8. The undigested food would accumulate in the body of the organisms in the absence of

(a) absorption.

(b) egestion.

(d) digestion.

Answer:

(b)

Egestion.

Explanation: If there had been no egestion then the undigested metabolic waste would have accumulated in the body leading to toxicity or poisoning.

9. The function of molars is

(a) smashing of food.

(b) biting and cutting of food.

(d) piercing and tearing of food.

Answer:

(c)

Crushing and grinding of food.

Explanation: The teeth posterior to the premolars on either side of the jaw are molars. They are grinding teeth, having large crowns and broad chewing or crushing surfaces.

10. The first set of teeth grows during infancy are

(a) wisdom teeth.

(b) milk teeth.

(d) major teeth.

Answer: