Tag: biology

Questions Related to biology

Amount of saliva secreted per day is

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. 250 ml

  2. 500 ml

  3. 750 ml

  4. 1000 ml

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Correct Option: D

Which gland does not take part in saliva production

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Parotid

  2. Submaxillary

  3. Submucosal

  4. Sublinguals

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Correct Option: C

How many pairs of salivary glands are there in humans

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: C

Variation in length of the filament of stamen can be seen in.

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Salvia

  2. Mustard

  3. Chinarose

  4. Both $(1)$ and $(2)$

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Correct Option: A

Which of the following statements is TRUE about glandular epithelium is salivary gland?

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. It consists of isolated single cells

  2. It consists of multicellular cluster of cells

  3. Its secretions are endocrine

  4. It consists of squamous epithelial cells

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Correct Option: B

Enzyme ptyalin or salivary amylase present in the saliva gets activated by 

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Mastication of food

  2. Hydrolysis of food by saliva

  3. Starch present in the food

  4. Chloride ions present in saliva

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Correct Option: A
Explanation:

Chewing or mastication is the process by which food is crushed and ground my teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. So the correct option is 'Mastication of food '.

Water evaporates into air from oceans, rivers and lakes but not from the soil.

biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature solar energy and its applications

  1. True

  2. False

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Correct Option: B
Explanation:

Soil also contains water, so evaporation also takes place from the soil.

The process by which water change into water vapour is called as

biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature

  1. Transpiration

  2. Evaporation

  3. Condensation

  4. Precipitation

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Correct Option: B

Identify the forms of precipitation.

biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature solar energy and its applications

  1. Rain

  2. Snow

  3. Hail

  4. All of the above

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Correct Option: D

Which of the following process in the water cycle takes place due to rapid cooling of air?

biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature solar energy and its applications

  1. Condensation

  2. Evaporation

  3. Precipitation

  4. None of the above

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Correct Option: A