Class 7 Science - Chapter Nutrition in Animals NCERT Solutions | Write one similarity and one difference
Write one similarity and one difference between the nutrition in amoeba and human beings.
Similarity: Amoeba and humans are heterotrophs. This means we need to derive energy from other organic sources of carbon.
- The digestive juices in amoeba are secreted into foods vacuole and in human beings the digestive juices are secreted in stomach and small intestine. Then the juices convert complex food into simpler soluble and absorbable substances.
- An amoeba is like a human being because they are both living things made of the same elements, similar macromolecules, and cells.
Difference: Amoeba captures the food with the help of pseudopodia and engulf it. In human beings food is taken by the mouth.
- Human beings have complex structure for the complete process of nutrition involving the following steps ingestion, digestion and egestion of food while Amoeba has a simple process in which it engulfs the food with the help of pseudopodia and traps it in food vacuoles. Though amoeba and humans share the same mode of nutrition, both process the nutrients and convert them into energy in different ways.
More Questions From Class 7 Science - Chapter Nutrition in Animals
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Label Fig. 2.11 of the digestive system.
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Can we survive only on raw, leafy vegetables/grass? Discuss.
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Which part of the digestive canal is involved in:
(i) absorption of food ________________.
(ii) chewing of food ________________.
(iii) killing of bacteria ________________.
(iv) complete digestion of food ________________.
(v) formation of faeces ________________. - Q:-
Match the items of Column I with suitable items in Column II
Column I Column II
(a) Salivary gland (i) Bile juice secretion
(b) Stomach (ii) Storage of undigested food
(c) Liver (iii) Saliva secretion
(d) Rectum (iv) Acid release
(e) Small intestine (v) Digestion is completed
(f ) Large intestine (vi) Absorption of water
(vii) Release of faeces - Q:-
Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
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Why do we get instant energy from glucose?
- Q:-
Match the items of Column I with those given in Column II:
Column I Column II
Food components Product(s) of digestion
Carbohydrates Fatty acids and glycerol
Proteins Sugar
Fats Amino acids - Q:-
Tick (✓) mark the correct answer in each of the following:
(a) Fat is completely digested in the
(i) stomach (ii) mouth (iii) small intestine (iv) large intestine(b) Water from the undigested food is absorbed mainly in the
(i) stomach (ii) foodpipe (iii) small intestine (iv) large intestine - Q:-
Where is the bile produced? Which component of the food does it help to digest?
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What are villi? What is their location and function?
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State differences between acids and bases.
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Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Name the elements that determine the weather of a place.
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Fill the missing word in the blank spaces in the following statements:
(a) Wind is——————air.
(b) Winds are generated due to —————— heating on the earth.
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(i) air and water
(ii) water and plants
(iii) minerals, organic matter, air and water
(iv) water, air and plants - Q:-
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Match structures given in Column I with functions given in Column II.
Column I Column II
(i) Stomata (a) Absorption of water
(ii) Xylem (b) Transpiration
(iii) Root hairs (c) Transport of food
(iv) Phloem (d) Transport of water
(e) Synthesis of carbohydrates - Q:-
Fill in the blanks:
(a) Production of new individuals from the vegetative part of parent is called_____________.
(b) A flower may have either male or female reproductive parts. Such a flower is called_____________.
(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _____________.
(d) The fusion of male and female gametes is termed as _____________.
(e) Seed dispersal takes place by means of _____________, _____________ and _____________. - Q:-
Classify the following as motion along a straight line, circular or oscillatory motion:
(i) Motion of your hands while running.
(ii) Motion of a horse pulling a cart on a straight road.
(iii) Motion of a child in a merry-go-round.
(iv) Motion of a child on a see-saw.
(v) Motion of the hammer of an electric bell.
(vi) Motion of a train on a straight bridge.
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Across
2. Plantation prevents it.
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