Nutrition in Animals Worksheets

Objective Type Questions

1. Fill in the blanks with suitable words.
   (a) The largest gland in the human body is …………….
   (b) The inner wall of the small intestine has several finger-like outgrowths called …………….
   (c) The ……………. together with the associated glands constitutes the digestive system.
   (d) The inner lining of the stomach secretes mucous, ……………. and digestive juices.
   (e) The tongue has ……………. to detect different tastes of food.
   
   
2. Find the odd one out.
   Lice, Hummingbirds, Houseflies, Snakes
   
   
3. Match the terms in column A with appropriate terms in column B.
   
   
   Multiple Choice Questions
   
   
4. The given picture depicts a honeybee obtaining nectar from the flowers. This mode of feeding is called
   
   
   
   (a) Chewing
   (b) Swallowing
   (c) Siphoning
   (d) Sucking
    
5. The image shows a frog acquiring food with the help of its tongue. 
   
   Sahil observed this image and claimed that the frog obtains its food by sucking. Is the claim made by Sahil, correct?
   (a) No; the frog is eating food as a whole, so its mode of feeding is swallowing.
   (b) No; the frog is using teeth to break its food, so its mode of feeding is chewing.
   (c) Yes; the frog is sucking the insect inside its mouth as is done for liquids, so its mode of feeding is sucking.
   (d) Yes; the frog is using its body to grind up the insect, so its mode of feeding is grinding.
   
   
6. The given chart lists some animals that acquire their food with different modes of feeding.
   
   
   
   Which two animals have the same mode of feeding?
   (a) Lice and Butterfly
   (b) Frog and Snail
   (c) Snails and Snakes
   (d) Butterfly and Ants
   
   
7. The table shows few animals classified into two groups, 1 and 2, based on their mode of feeding.
   
   
   
   Which other animals can be included in group 1 and group 2?
   (a) Group 1-Ants; Group 2-Snails
   (b) Group 1-Bees; Group 2-Lizards
   (c) Group 1-Snails; Group 2-Sucking
   (d) Group 1-Spiders; Group 2-Housefly
   
    
8. The below diagram shows an unlabelled sketch of the human digestive system.
   
   
   
   Which of the following correctly describes the functions of the parts marked as A, B C and D?
   
   
   
   
9. A patient complained of nausea, bloating and abdominal pain. After medical examination, the doctor reported this as a case of improper digestion of fats in the body. According to the doctor, the organ that secretes bile has been damaged due to consumption of excessive alcohol by the patient. Which organ of the patient has been damaged?
   (a) Kidney
   (b) Liver
   (c) Lungs
   (d) Pancreas
   
   
10. The table shows the contents of four different solutions.
    
    
    
    Which solution is likely to have the highest amount of starch?
    (a) A
    (b) B
    (c) C
    (d) D
    
    
11. Humans chew food only when they have food in their mouth, but buffaloes chew continuously even when they are not eating grass. What could be the reason behind this?
    (a) Buffaloes chew continuously because they store undigested grass in their mouth.
    (b) Buffaloes chew continuously to remove the stuck food particles from their mouth parts.
    (c) Buffaloes chew continuously because cud, the partially digested food, returns to their mouth in small lumps.
    (d) Buffaloes chew continuously to collect saliva in their mouth so that more bacteria can be formed in their mouth.
    
    
12. In some grass-eating animals such as horses and rabbits, a sac-like structure is present between the oesophagus and the small intestine. It helps these animals to digest the cellulose present in food. This structure is absent in humans. What is the name of this structure, and how is it able to digest cellulose?
    (a) Rumen; the presence of certain bacteria that are absent in humans
    (b) Rumen; the presence of certain proteins that are absent in humans
    (c) Caecum; the presence of certain bacteria that are absent in humans
    (d) Caecum; the presence of certain proteins that are absent in humans
    
    Subjective Questions
    
    
13. Jatin was eating his breakfast hurriedly as he wanted to reach the railway station on time. Suddenly, while eating, Jatin began to cough and felt a choking sensation in his throat. What could be the reason behind this?
    
    
14. Which part of the alimentary canal participates in the following processes?
    Choose the correct terms from those given in the brackets.
    
    
    (a) Chewing of food
    (b) Killing of bacteria
    (c) Complete digestion of food
    (d) Formation of faeces
    
    
15. Observe the figure showing the different regions of the tongue. 
    
    
    
    (a) What are regions 1, 2, 3, and 4 collectively referred to as?
    (b) Identify 1, 2, 3, and 4.
    (c) Which region of the tongue will be able to tell the taste of lemon juice?
    (d) Give two examples of foods whose taste can be detected at regions 1 and 4. 
    
    Case-Based Questions
    
    
16. The food we eat contains a lot of complex, insoluble nutrients. These nutrients cannot be directly absorbed by the body. They must be broken down into smaller, soluble molecules which can be easily absorbed by the blood. 
    
    
    
    a) Which life process helps to break down the food?
    (a) Digestion
    (b) Egestion
    (c) Nutrition
    (d) Excretion
    
    b) What role does the human digestive system play in the body?
    
    
17. An experimental set up was placed in front of Sana during her practical exam. The set up consisted of two test tubes A and B. Test tube A contained a slurry of rice flour while test tube B contained a slurry of boiled and chewed rice. Sana was required to add iodine solution to both the test tubes and note down her observations.
    
    
    
    a) What will be Sana’s observation after adding iodine solution to both the test tubes?
    (a) Test tube A showed colour change to blue-black but there was no colour change in test tube B.
    (b) Test tube A showed no colour change but test tube B showed colour change to blue-black.
    (c) Both test tube A and test tube B showed colour change to blue-black.
    (d) Both test tube A and test tube B did not show any colour change.
    
    b) How will you interpret the observations in the above experiment? Explain.
    
    c) Which of the following statements is true with respect to the above experiment?
    (a) Chewing adds starch in the food, which converts the amino acids into proteins.
    (b) Chewing adds saliva in the food, which converts the starch into sugars.
    (c) Chewing adds saliva in the food, which converts the sugar into starch.
    (d) Chewing adds starch in the food, which converts the proteins into amino acids.
    
    d) If we had to replace rice flour with some other ingredient, which of the following would you use to obtain the same results as above?(a) Orange juice
    (b) Moong dal
    (c) Mustard oil
    (d) Boiled potato
    
    
18. Amoeba feeds on some microscopic organisms. It pushes out one, or more finger-like projections, called pseudopodia or false feet for movement and capture of food.
    a) The given chart lists the steps involved in food intake by Amoeba. 
    
    
    Which of the following is the correct sequence of steps?
    (a) A → B → C → D
    (b) A → C → B → D
    (c) B → A → C → D
    (d) B → C → A → D
    
    b) The given image shows the process of obtaining food by Amoeba. A researcher wants to work on that component of Amoeba in which secretion of digestive juices takes place. Which label in the image represents that component?
    
    
    
    (a) A
    (b) B
    (c) C
    (d) D
    
    Assertion-Reasoning Questions
    
    Below questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below: 
    
    
    
19. Assertion (A): A person suffering from diarrhoea must be given ORS many times a day.
    Reason (R): Diarrhoea leads to loss of water and salts from the body of a person.
    
    
20. Assertion (A): Alternate contractions and relaxations of the muscles of the stomach produce a wave-like movement called peristalsis.
    Reason (R): Peristalsis helps to push food downwards in the alimentary canal.

Objective Type Questions

1. Fill in the blanks with suitable words.
   (a) The largest gland in the human body is …………….
   (b) The inner wall of the small intestine has several finger-like outgrowths called …………….
   (c) The ……………. together with the associated glands constitutes the digestive system.
   (d) The inner lining of the stomach secretes mucous, ……………. and digestive juices.
   (e) The tongue has ……………. to detect different tastes of food.
   Solution:
   (a) liver
   (b) villi
   (c) alimentary canal
   (d) hydrochloric acid
   (e) taste buds
   
   
2. Find the odd one out.
   Lice, Hummingbirds, Houseflies, Snakes
   Correct Answer: Snakes
   Solution: Snakes swallow the animal ‘whole’ which they prey upon while lice, humming birds and houseflies obtain their food by sucking.
   
   
3. Match the terms in column A with appropriate terms in column B.
   
   Solution:
   (a) Butterfly – ii) Sucking
   (b) Ant – iv) Biting
   (c) Eagle – i) Tearing
   (d) Snail – iii) Scraping
   
   Multiple Choice Questions
   
   
4. The given picture depicts a honeybee obtaining nectar from the flowers. This mode of feeding is called
   
   
   
   (a) Chewing
   (b) Swallowing
   (c) Siphoning
   (d) Sucking
   Correct Option: (d) Sucking
   Solution: Insects such as honeybee use their long feeding tube to suck nectar from the flowers and obtain their nourishment.
   
   
5. The image shows a frog acquiring food with the help of its tongue. 
   
   Sahil observed this image and claimed that the frog obtains its food by sucking. Is the claim made by Sahil, correct?
   (a) No; the frog is eating food as a whole, so its mode of feeding is swallowing.
   (b) No; the frog is using teeth to break its food, so its mode of feeding is chewing.
   (c) Yes; the frog is sucking the insect inside its mouth as is done for liquids, so its mode of feeding is sucking.
   (d) Yes; the frog is using its body to grind up the insect, so its mode of feeding is grinding.
   Correct Option: (a) No; the frog is eating food as a whole, so its mode of feeding is swallowing.
   Solution: The frog eats flying insects as food. It uses its long and cleft tongue to catch its prey like insects and then swallows it.
   
   
6. The given chart lists some animals that acquire their food with different modes of feeding.
   
   
   
   Which two animals have the same mode of feeding?
   (a) Lice and Butterfly
   (b) Frog and Snail
   (c) Snails and Snakes
   (d) Butterfly and Ants
   Correct Option: (a) Lice and Butterfly
   Solution: Lice feed by sucking blood from the skin of the scalp. Butterflies use their long feeding tube to suck nectar from flowers.
   
   
7. The table shows few animals classified into two groups, 1 and 2, based on their mode of feeding.
   
   
   
   Which other animals can be included in group 1 and group 2?
   (a) Group 1-Ants; Group 2-Snails
   (b) Group 1-Bees; Group 2-Lizards
   (c) Group 1-Snails; Group 2-Sucking
   (d) Group 1-Spiders; Group 2-Housefly
   Correct Option: (b) Group 1-Bees; Group 2-Lizards
   Solution: Human infants, lice and butterfly obtain their food by sucking. Bees also suck in nectar from the flowers. Hence, bees can be included in Group 1. Snakes, frogs, and earthworms obtain their food by swallowing. Lizards also crush their prey and swallow it before chewing. Hence, lizards can be included in Group 2.
    
8. The below diagram shows an unlabelled sketch of the human digestive system.
   
   
   
   Which of the following correctly describes the functions of the parts marked as A, B C and D?
   
   
   Correct Option: (d)
   
   Solution:
   A – Stomach – Secretion of acids and enzymes
   B – Pancreas – Secretion of pancreatic juice
   C – Small intestine – Digestion and absorption of food
   D – Large intestine - Absorption of water
   
   
9. A patient complained of nausea, bloating and abdominal pain. After medical examination, the doctor reported this as a case of improper digestion of fats in the body. According to the doctor, the organ that secretes bile has been damaged due to consumption of excessive alcohol by the patient. Which organ of the patient has been damaged?
   (a) Kidney
   (b) Liver
   (c) Lungs
   (d) Pancreas
   Correct Option: (b) Liver
   Solution: Liver secretes bile which gets temporarily stored in the gall bladder. The bile plays a key role in the digestion of fats. It converts fats into tiny droplets so that their further breakdown becomes easy.
   
   
10. The table shows the contents of four different solutions.
    
    
    
    Which solution is likely to have the highest amount of starch?
    (a) A
    (b) B
    (c) C
    (d) D
    Correct Option: (a) A
    Solution: Chewing food releases saliva from the salivary glands present in the mouth. The saliva breaks down the starch present in the food into sugars. The more you chew the food, greater is the breakdown of starch into sugars. Therefore, the food which is not chewed will have more starch as compared to foods which have been chewed. Hence, crushed boiled potato (Solution A) which has not been chewed will have the highest amount of starch.
    
    
11. Humans chew food only when they have food in their mouth, but buffaloes chew continuously even when they are not eating grass. What could be the reason behind this?
    (a) Buffaloes chew continuously because they store undigested grass in their mouth.
    (b) Buffaloes chew continuously to remove the stuck food particles from their mouth parts.
    (c) Buffaloes chew continuously because cud, the partially digested food, returns to their mouth in small lumps.
    (d) Buffaloes chew continuously to collect saliva in their mouth so that more bacteria can be formed in their mouth.
    Correct Option: (c) Buffaloes chew continuously because cud, the partially digested food, returns to their mouth in small lumps.
    Solution: Ruminants such as buffaloes cannot chew their food (grass) completely at the time they eat it because they have very short time available for grazing grass. They swallow the grass quickly with little chewing and store it in the rumen (cud). The cud is then brought back to the mouth and chewed again by a process called rumination.
    
    
12. In some grass-eating animals such as horses and rabbits, a sac-like structure is present between the oesophagus and the small intestine. It helps these animals to digest the cellulose present in food. This structure is absent in humans. What is the name of this structure, and how is it able to digest cellulose?
    (a) Rumen; the presence of certain bacteria that are absent in humans
    (b) Rumen; the presence of certain proteins that are absent in humans
    (c) Caecum; the presence of certain bacteria that are absent in humans
    (d) Caecum; the presence of certain proteins that are absent in humans
    Correct Option: (c) Caecum; the presence of certain bacteria that are absent in humans
    Solution: Grass-eating animals such as horses and rabbits have a large sac-like structure called caecum present between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans.
    
    Subjective Questions
    
    
13. Jatin was eating his breakfast hurriedly as he wanted to reach the railway station on time. Suddenly, while eating, Jatin began to cough and felt a choking sensation in his throat. What could be the reason behind this?
    Solution: If a person eats in a hurry, talks, or laughs while eating, he may cough, get hiccups, or feel a choking sensation. It is because the food particles enter the windpipe instead of entering the food pipe. Inside the throat, air and food share a common passage. However, food is prevented from entering the windpipe by a flap-like valve that closes the passage of the windpipe and guides the food into the food pipe. If, by chance, food particles enter the windpipe, we feel choked, get hiccups or cough.
    
    
14. Which part of the alimentary canal participates in the following processes?
    Choose the correct terms from those given in the brackets.
    
    
    (a) Chewing of food
    (b) Killing of bacteria
    (c) Complete digestion of food
    (d) Formation of faeces
    Solution:
    (a) Buccal cavity
    (b) Stomach
    (c) Small intestine
    (d) Large intestine
    
    
15. Observe the figure showing the different regions of the tongue. 
    
    
    
    (a) What are regions 1, 2, 3, and 4 collectively referred to as?
    (b) Identify 1, 2, 3, and 4.
    (c) Which region of the tongue will be able to tell the taste of lemon juice?
    (d) Give two examples of foods whose taste can be detected at regions 1 and 4.
    Solution:
    (a) Taste buds
    (b) 1 – Bitter taste, 2 – Sour taste, 3 – Salty taste, 4 – Sweet taste
    (c) Region 2 detects sour taste and hence, will be able to tell the taste of lemon juice.
    (d) Region 1 – Bitter gourd, neem leaves
         Region 4 – Chocolates, sugar
    
    Case-Based Questions
    
    
16. The food we eat contains a lot of complex, insoluble nutrients. These nutrients cannot be directly absorbed by the body. They must be broken down into smaller, soluble molecules which can be easily absorbed by the blood. 
    
    
    
    a) Which life process helps to break down the food?
    (a) Digestion
    (b) Egestion
    (c) Nutrition
    (d) Excretion
    Correct option: (a) Digestion
    Solution: The process in which the food containing large, insoluble substances are broken down into smaller, water-soluble substances which can be absorbed by the body is called digestion.
    
    b) What role does the human digestive system play in the body?
    Solution: Digestion and absorption are the two main functions of the human digestive system. Digestion is necessary for breaking down food particles into nutrients that can be used by the body as an energy source, for cell repair and growth. The digested food is then absorbed by the body to obtain energy.
    
    
17. An experimental set up was placed in front of Sana during her practical exam. The set up consisted of two test tubes A and B. Test tube A contained a slurry of rice flour while test tube B contained a slurry of boiled and chewed rice. Sana was required to add iodine solution to both the test tubes and note down her observations.
    
    
    
    a) What will be Sana’s observation after adding iodine solution to both the test tubes?
    (a) Test tube A showed colour change to blue-black but there was no colour change in test tube B.
    (b) Test tube A showed no colour change but test tube B showed colour change to blue-black.
    (c) Both test tube A and test tube B showed colour change to blue-black.
    (d) Both test tube A and test tube B did not show any colour change.
    Correct option: (a) Test tube A showed colour change to blue black but there was no colour change in test tube B.
    Solution: Test tube A contained a slurry of rice flour which is rich in starch. It reacts with iodine solution and turns blue-black in colour. Test tube B contained boiled, chewed rice. Chewing adds saliva in the food, which converts the starch into sugars. Since sugar does not react with iodine, no colour change was seen in test tube B.
    
    b) How will you interpret the observations in the above experiment? Explain.
    Solution: Test tube A contained a slurry of rice flour which is rich in starch. It reacts with iodine solution and turns blue-black in colour. Test tube B contained boiled, chewed rice. Although boiled rice is rich in starch, chewing adds saliva in the food, which converts the starch into sugars. Since sugar does not react with iodine, no colour change was seen in test tube B.
    
    c) Which of the following statements is true with respect to the above experiment?
    (a) Chewing adds starch in the food, which converts the amino acids into proteins.
    (b) Chewing adds saliva in the food, which converts the starch into sugars.
    (c) Chewing adds saliva in the food, which converts the sugar into starch.
    (d) Chewing adds starch in the food, which converts the proteins into amino acids.
    Correct option: (b) Chewing adds saliva in the food, which converts the starch into sugars.
    Solution: Chewing food releases saliva from the salivary glands present in the mouth. The saliva breaks down the starch present in the food into sugars.
    
    d) If we had to replace rice flour with some other ingredient, which of the following would you use to obtain the same results as above?(a) Orange juice
    (b) Moong dal
    (c) Mustard oil
    (d) Boiled potato
    Correct option: (d) Boiled potato
    Solution: Boiled potato is rich in starch and hence will react with iodine to produce a blue-black colour like rice flour. Oranges are rich in vitamins; moong is a rich source of protein while mustard oil is rich in fats.
    
    
18. Amoeba feeds on some microscopic organisms. It pushes out one, or more finger-like projections, called pseudopodia or false feet for movement and capture of food.
    a) The given chart lists the steps involved in food intake by Amoeba. 
    
    
    Which of the following is the correct sequence of steps?
    (a) A → B → C → D
    (b) A → C → B → D
    (c) B → A → C → D
    (d) B → C → A → D
    Correct Option: (b) A → C → B → D
    Solution: When Amoeba senses food, it pushes out pseudopodia around the food particle and engulfs it. The food becomes trapped in a food vacuole where it is digested by the digestive enzymes and finally the food is absorbed and distributed throughout the body.
    
    b) The given image shows the process of obtaining food by Amoeba. A researcher wants to work on that component of Amoeba in which secretion of digestive juices takes place. Which label in the image represents that component?
    
    
    
    (a) A
    (b) B
    (c) C
    (d) D
    Correct Option: (c) C
    Solution: A – Nucleus, B – Pseudopodium, C – Food vacuole, D – Cell membrane
    In Amoeba, digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances.
    
    Assertion-Reasoning Questions
    
    Below questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below: 
    
    
    
19. Assertion (A): A person suffering from diarrhoea must be given ORS many times a day.
    Reason (R): Diarrhoea leads to loss of water and salts from the body of a person.
    Correct Option: (a) Both A and R are true and R is the correct explanation of A.
    Solution: Diarrhoea leads to loss of water and salts from the body of a person through frequent watery stools. A person suffering from diarrhoea must be given ORS (Oral Rehydration Solution) many times a day. It helps to make up for the loss of water and salt in the body. The sugar gives energy which helps in speedy recovery.
    
    
20. Assertion (A): Alternate contractions and relaxations of the muscles of the stomach produce a wave-like movement called peristalsis.
    Reason (R): Peristalsis helps to push food downwards in the alimentary canal.
    Correct Option: (d) A is false but R is true.
    Solution: The food coming from the mouth moves down through the oesophagus by peristalsis. The alternate contractions and relaxations of the muscles in the walls of the oesophagus produce a wave-like movement called peristalsis. This helps to push food downwards towards the stomach.