Students can solve these Class 7 Science MCQ and Class 7 Science Chapter 9 Life Processes in Animals MCQ Questions Online Test with Answers to assess their preparation level.
Class 7 Life Processes in Animals MCQ with Answers
MCQ on Life Processes in Animals Class 7
Class 7 Science Chapter 9 Life Processes in Animals MCQ Questions with Answers
Question 1.
Where does digestion of food start in the human digestive system?
(a) Mouth
(b) Oesophagus
(c) Stomach
(d) Small intestine
Answer:
(a) Mouth
Question 2.
The enzymes present in the saliva convert
(a) fats into fatty acids and glycerol
(b) starch into simple sugars
(c) proteins into amino acids
(d) complex sugars into simple sugars
Answer:
(b) starch into simple sugars
Question 3.
The swallowed food moves downwards in the alimentary canal because of
(a) force provided by the muscular tongue
(b) the flow of water taken with the food
(c) gravitational pull
(d) the contraction of muscles in the wall of foodpipe
Answer:
(d) the contraction of muscles in the wall of foodpipe
Question 4.
The acid present in the stomach
(a) kills the harmful bacteria that may enter along with the food
(b) protects the stomach lining from harmful substances
(c) digests starch into simple sugars
(d) makes the medium alkaline
Answer:
(a) kills the harmful bacteria that may enter along with the food
Question 5.
The greatest amount of digestion of food takes place in
(a) large intestine
(b) small intestine
(c) mouth
(d) stomach
Answer:
(b) small intestine
Question 6.
Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions?
(a) Oesophagus, large intestine, rectum
(b) Buccal cavity, oesophagus, rectum
(c) Buccal cavity, oesophagus, large intestine
(d) Small intestine, large intestine, rectum
Answer:
(a) Oesophagus, large intestine, rectum
Question 7.
Observe the given diagram of the human digestive system. Which part is responsible for the absorption of nutrients and also receives the secretion from the liver to aid in digestion?
(a) A
(b) D
(c) B
(d) C
Answer:
(b) D
Question 8.
Cud is the name given to the food of ruminants which is
(a) swallowed and undigested
(b) swallowed and partially digested
(c) properly chewed and partially digested
(d) properly chewed and completely digested
Answer:
(b) swallowed and partially digested
Question 9.
According to ancient practices, which of the following spices are known to enhance digestion?
(a) Turmeric and cinnamon
(b) Ginger, black pepper and cumin
(c) Cardamom and clove
(d) Mustard and fennel
Answer:
(b) Ginger, black pepper and cumin
Question 10.
Which ancient Ayurvedic text highlights the importance of digestion and the use of spices?
(a) Sushruta Samhita
(b) Charaka Samhita
(c) Atharva Veda
(d) Rig Veda
Answer:
(b) Charaka Samhita
Question 11.
Which of the following habits is least supportive of a healthy digestive system according to both traditional and modern insights?
(a) Eating at fixed times daily
(b) Chewing food slowly and mindfully
(c) Using spices like ginger and cumin in cooking
(d) Consuming large quantities of food in one sitting
Answer:
(d) Consuming large quantities of food in one sitting
Question 12.
What is the process called when grass-eating animals bring back partially digested food to the mouth for chewing again?
(a) Regurgitation
(b) Ingestion
(c) Rumination
(d) Egestion
Answer:
(c) Rumination
Question 13.
Which group of animals is adapted to bring partially digested food back to the mouth for further chewing and why is this adaptation beneficial?
(a) Carnivores – to re-chew meat for easier swallowing
(b) Ruminants – to aid in the digestion of tough plant material like cellulose
(c) Omnivores – to taste food again
(d) Herbivores – to store extra food
Answer:
(b) Ruminants – to aid in the digestion of tough plant material like cellulose
Question 14.
Birds do not have teeth. How do they breakdown food?
(a) Using their beak
(b) In the stomach with acid
(c) In the gizzard through muscular movement
(d) With their tongue
Answer:
(c) In the gizzard through muscular movement
Question 15.
What do some birds swallow to help grind food inside their gizzard?
(a) Sand
(b) Water
(c) Grit or small stones
(d) Insects
Answer:
(c) Grit or small stones
Question 16.
A teacher asked a student to observe inhalation. The student observed an expansion in his chest during inhalation. The teacher told the student that it is because of the movement of ribs and diaphragm. What movement is likely to be found in the ribs and diaphragm of the student during inhalation?
| Diaphragm | Ribs |
| (a) Moves up | Moves up and inward |
| (b) Moves down | Moves up and outward |
| (c) Moves up | Moves down and inward |
| (d) Moves down | Moves up and inward |
Answer:
(b) Moves down
Question 17.
Which of these animals breathes through its skin?
(a) Fish
(b) Bird
(c) Snake
(d) Earthworm
Answer:
(d) Earthworm
Question 18.
Choose which among the following can breathe through lungs as well as through skin?
(a) Fish
(b) Frog
(c) Earthworm
(d) Dolphin
Answer:
(b) Frog
Question 19.
Digestion of starch starts in
(a) stomach
(b) mouth
(c) small intestine
(d) large intestine
Answer:
(b) mouth
Question 20.
Which of the following organ does not secrete digestive juice?
(a) Liver
(b) Pancreas
(c) Stomach
(d) Oesophagus
Answer:
(d) Oesophagus
Question 21.
Chemical used to test the presence of CO2 in exhaled air
(a) water
(b) lime water
(c) orange juice
(d) lemon juice
Answer:
(b) lime water
Question 22.
Unwanted particles In air are trapped in which part of the human respiratory system?
(a) Trachea
(b) Bronchi
(c) Larynx
(d) Nasal cavity
Answer:
(d) Nasal cavity
Question 23.
Birds breathe through
(a) lungs
(b) gIIs
(c) trachea
(d) skin
Answer:
(a) lungs
Life Processes in Animals Class 7 Assertion-Reason Type Questions
I. The following questions consist of two statements Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Question 1.
Assertion (A) Bread taste sour when chewed for some time.
Reason (R) Bread contains starch.
Answer:
(d) A is false, but R is true. A can be corrected as Bread tastes sweet when chewed for some time.
Question 2.
Assertion (A) The inner lining of stomach is protected from the effect of acid.
Reason (R) The inner lining of the stomach secrete mucus.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Question 3.
Assertion (A) We exhale only carbon dioxide.
Reason (R) Carbon dioxide turns lime water cloudy.
Answer:
(d) A is false, but R is true. A can be corrected as We exhale a mixture of gases containing nitrogen, water vapour together with carbon dioxide.
Question 4.
Assertion (A) During inhalation, the diaphragm moves downward and the ribs expand outward.
Reason (R) The movement of the diaphragm and ribs increases the chest cavity’s volume, allowing air to enter the lungs.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Question 5.
Assertion (A) Fish breathe through gills to extract oxygen from water.
Reason (R) Gills allow fish to absorb oxygen dissolved in water, as they do not have lungs like land animals.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
II. The following questions consist of two statements
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(C) A is true, but R is false
Cd) A is false, but R is true
Question 1.
Assertion (A) Ingestion of food Is difficult without teeth.
Reason (R) Teeth helps in breaking down the food into small pieces.
Answer:
(a) Both A and R are true and R is the correct explanation of A
Question 2.
Assertion (A) Gaseous exchange in humans takes place in the alveoli.
Reason (R) Alveoli have thin walls and many blood vessels for easy gas exchange.
Answer:
(a) Both A and R are true and R is the correct explanation of A
Life Processes in Animals Class 7 Fill in the blanks
Question 1.
The alimentary canal stretches from _______ to _______
Answer:
mouth, anus
Question 2.
Digestion of food starts in _______ and gets completed in _______
Answer:
buccal cavity, small intestine
Question 3.
_______ is the process of removing undigested waste material from the body.
Answer:
Ingestion
Question 4.
During inhalation, the diaphragm moves _______ and the ribs moves _______ to increase the chest cavity volume.
Answer:
downward, upward and outward
Question 5.
The process of breathing in oxygen and breathing out carbon dioxide is known as _______.
Answer:
respiration
Question 6.
_______ is the long tube-like structure, which constitutes digestive organs and associated glands.
Answer:
Alimentary canal
Question 7.
Liver secretes _______ into the small intestine.
Answer:
bile
Question 8.
Lungs are very _______ organs.
Answer:
elastic
Life Processes in Animals Class 7 True or False
Question 1.
In humans, the digestion of food starts in the stomach.
Answer:
False
Question 2.
Cows are ruminants, meaning they chew their food multiple times to aid in digestion.
Answer:
True
Question 3.
In human respiration, oxygen is absorbed and carbon dioxide is released through the gills.
Answer:
False
Question 4.
Frogs use their lungs for breathing both on land and in water, but they also exchange gases through their skin.
Answer:
True
Question 5.
Fish breathe by taking in oxygen through their lungs, similar to humans.
Answer:
False
Question 6.
The digestion of starch only takes place in the stomach.
Answer:
False
Question 7.
We take deep breathes after we hold on breathe for the one minute.
Answer:
True
Question 8.
In animals gaseous exchange occurs in the alveoli.
Answer:
True
Life Processes in Animals Class 7 Case Based Questions
Question 1.
In a class project about respiration, Pankaj measured the chests of various students and recorded his observation in a table.
| Chest Measurements | Student 1 | Student 2 | Student 3 | Student 4 |
| Inhalation | 62 cm | 58 cm | 60 cm | 65 cm |
| Exhalation | 45 cm | 54 cm | 53 cm | 56 cm |
(i) Chest expansion is the difference in chest sizes during inhalation and exhalation. Which student’s chest expanded the most?
(a) Student 1
(b) Student 2
(c) Student 3
(d) Student 4
Answer:
(a) Student 1
(ii) What should be done to confirm the chest measurement of the four students?
(a) Repeat the chest measurement with four new students.
(b) Repeat each student’s chest measurement for inhalation only.
(c) Repeat the chest measurement using a different measuring tape.
(d) Repeat each student’s chest measurement for both inhalation and exhalation.
Answer:
(d) Repeat each student’s chest measurement for both inhalation and exhalation.
Life Processes in Animals Class 7 Match the following
Question 1.
Match the Column I with Column II.
| Column I | Column II |
| A. Mouth | 1. Absorption of nutrients takes place |
| B. Stomach | 2. Secretes acid to kill bacteria |
| C. Small intestine | 3. Saliva breakdown starch into simpler forms |
| D. Large intestine | 4. Water absorption and formation of faeces |
Answer:
| Column I | Column II |
| A. Mouth | 3. Saliva breakdown starch into simpler forms |
| B. Stomach | 2. Secretes acid to kill bacteria |
| C. Small intestine | 1. Absorption of nutrients takes place |
| D. Large intestine | 4. Water absorption and formation of faeces |
Question 2.
Match the Column I with Column II.
| Column I | Column II |
| A. Lungs | 1. Gas exchange(oxygen in, carbon dioxide out) |
| B. Diaphragm | 2. Moves downward during inhalation |
| C. Trachea | 3. Passage for air to reach the lungs |
| D. Alveoli | 4. Tiny air sacs, where oxygen and carbon dioxide exchange happens |
Answer:
| Column I | Column II |
| A. Lungs | 1. Gas exchange(oxygen in, carbon dioxide out) |
| B. Diaphragm | 2. Moves downward during inhalation |
| C. Trachea | 3. Passage for air to reach the lungs |
| D. Alveoli | 4. Tiny air sacs, where oxygen and carbon dioxide exchange happens |
Question 3.
Match the Column lwith Column Il.
| Column I | Column II |
| A. Oesophagus | 1. Tube that cames food to the stomach. |
| B. Rectum | 2. Stores and eliminates waste from the body. |
| C. Bronchi | 3. The large airway that divides into left and right lungs. |
| D. Trachea | 4. Carries air to and from the lungs |
| E. Ribs | 5. Protects the lungs and helps with breathinng by expanding and contracting |
Answer:
| Column I | Column II |
| A. Oesophagus | 1. Tube that cames food to the stomach. |
| B. Rectum | 2. Stores and eliminates waste from the body. |
| C. Bronchi | 3. The large airway that divides into left and right lungs. |
| D. Trachea | 4. Carries air to and from the lungs |
| E. Ribs | 5. Protects the lungs and helps with breathinng by expanding and contracting |