Class 7 Science
Very short answer type question:
Question 1: What is a carnivorous animal? Give two examples.
Answer: Animals, which eat the flesh of other animals, are called carnivorous, e.g. lion, tiger.
Question 2: What is the function of the digestive juice secreted by the liver?
Answer: The digestive juice from the liver breaks up fat into tiny particle.
Question 3: Name the organs that make up the alimentary canal.
Answer: Mouth, oesophagus, stomach, small intestine, large intestine and rectum compose the alimentary canal.
Question 4: Name the four types of teeth.
Answer: The four types of teeth are: Incisors, Canines, Premolars and Molars.
Question 5: Name the four compartments in a ruminant’s stomach.
Answer: Four compartments in a ruminant’s stomach are: Rumen, reticulum, omasum and abomasum.
Choose the correct answer:
Questions 1: Movement of food through alimentary canal is called by which of these terms?
Answer: (b) Peristalsis
Question 2: The liver produces which of these enzymes?
(d) None of these
Answer: (d) None of these.
Question 3: Which of these is not a part of nutrition?
Answer: (b) Excretion.
Question 4: Digestive juice is not secreted by which of these organs?
(a) Small intestine
Answer: (b) liver
Question 5: The walls of the large intestine absorb which of these?
(b) Digested food
Answer: (d) Water.
Question 6: Which of the following is not a part of ruminant stomach?
Answer: (b) Anus
Question 7: Bile is produced by which organ?
(b) Gall bladder
Answer: (c ) Liver
Match the following
|Column A||Column B|
|(1) Villi||(A) Large intestine|
|(2) Hydrochloric acid||(B) Liver|
|(3) Bile||(C) Mouth|
|(4) Absorption of water||(D) Stomach|
|(5) Mastication||(E) Small intestine|
Answer: 1-E, 2-D, 3- B, 4- A, 5- C
Fill in the blanks
1: Most of the enzymes in the small intestine come from ______
2: The __________ present on our tongue help us to taste food.
3: Saliva is secreted in the mouth by _______________
4: Living organisms that cannot make their own food are called__________
Answer: 1 → Pancreas, 2 → taste receptor, 3 → salivary gland, 4 → heterotrophs
Write true and false
1: Absorption and assimilation are similar processes.
2: Some plants are heterotrophic and depend on others for food.
3: Hydrochloric acid is present in the stomach.
4: Pitcher plant is an example of insectivorous plant.
5: Saprophytes are green in colour.
6: Ruminants have a three-chambered stomach.
7: An adult human has 32 teeth in all – 16 in each jaw.
8: Tongue gives the sense of smell.
Answer: 1 → F, 2 → T, 3 → T, 4 → T, 5 → F, 6 → F, 7 → T, 8 → F