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Why do we get instant energy from glucose?
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Which part of the digestive canal is involved in:
Absorption of food ______.
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Which part of the digestive canal is involved in:
Chewing of food ______.
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Which part of the digestive canal is involved in:
Killing of bacteria ______.
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Which part of the digestive canal is involved in:
Complete digestion of food ______.
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Which part of the digestive canal is involved in:
Formation of faeces ______.
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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 |
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Label the following figure of the digestive system.

A part of the human digestive system
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Seed dispersal takes place by means of ______, ______ and ______.
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Describe the various ways by which seeds are dispersed.
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An image formed by a concave ______ cannot be obtained on a screen.
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A concave lens always forms a virtual image.
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A real image cannot be obtained on a screen.
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State two differences between a convex and a concave lens.
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Which type of lens forms always a virtual image?
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Given below from (i) to (iv) are some food items.
- Boiled and mashed potato
- Glucose solution
- A slice of bread
- Mustard oil
Which of the above will give a blue-black colour when tested with iodine?
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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?
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The enzymes present in the saliva convert ______.
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Cud is the name given to the food of ruminants which is ______.
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Choose the correct order of terms that describes the process of nutrition in ruminants.
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