Tag: environmental science

Questions Related to environmental science

Match the following

Sr. No  Column -I Sr.No Column -II
a. Earthworms i Network of tube
b. Aquatic arthropods  ii Lungs 
c. Molluscs iii Gills
d. Terrestrial organisms iv Moist cuticle
e. Insects
zoology environmental science structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. a-i;b-ii;c-iii;d-iv;e-iii

  2. a-iv;b-iii;c-iii;d-ii;e-i

  3. a-iv;b-ii;c-i;d-iii;e-iii

  4. a-iv;b-ii;c-iii;d-i;e-iii

Show answer
Correct Option: A

The bats are able to fly in dark since their mouth produce?

biology environmental science plant adaptation adaptation in plants plant habitat

  1. Sound waves

  2. Ultrasonic waves

  3. Infrared rays

  4. Ultraviolet rays

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Correct Option: A

The bats are able to fly in dark since their mouth produce

biology environmental science plant adaptation adaptation in plants plant habitat

  1. Sound waves

  2. Ultrasonic waves

  3. Infrared rays

  4. Ultraviolet rays

Show answer
Correct Option: B
Explanation:
Every night a bat puts in 600-700 kilometres of airtime. Flying low, the animals catch insects at speeds of around 40 metres per second. At night the bat uses its hearing to navigate its way to prey. Bats catch insects continuously using echolocation, an advanced navigation system. The bat emits ultrasonic waves with very high frequencies. Its calls are pitched at 20-100 kilohertz, a frequency that is too high-pitched for humans to hear naturally. Their sounds are reflected in the environment, hitting various objects and returning to the bat as echoes. The echo signals enable the bat to form a mental map of its surroundings.
So the correct option is 'ultrasonic waves'.

If large quantities of domestic sewage is continuously emptied into a small stream, it leads to

zoology environmental science personal and public cleanliness who will do this? basics of water pollution

  1. depletion of oxygen content in stream water

  2. depletion of nutrients in the stream water

  3. enrichment of oxygen content in stream water

  4. increase in the total amount of life in the stream water.

Show answer
Correct Option: A
Explanation:

If large quantities of domestic sewage are continuously emptied into a small stream, it leads to depletion of oxygen content in stream water as microbes that develop to degrade the organic matter shall consume the oxygen and reduces its amount.

So the correct option is 'depletion of oxygen content in stream water'

Water should pretreat before its disposal.

zoology environmental science personal and public cleanliness who will do this? basics of water pollution

  1. True

  2. False

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Correct Option: A