Tag: option c: ecology and conservation

Questions Related to option c: ecology and conservation

What will be percentage of water absorbed?

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. $\displaystyle\frac {U - V}{100} X 50$

  2. $\displaystyle\frac {V - U}{50} X 100$

  3. $\displaystyle\frac {U - V}{50} X100$

  4. $\displaystyle\frac {V - U}{100} X50$

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Correct Option: C
Explanation:

U - V ? 50 * 100 is the percentage of water absorbed where, 

U is the initial volume of water and V is the final volume of water. 
So, option C is the correct answer.

E.P. Odum is a leading

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Bryologist

  2. Physiologist

  3. Ecologist

  4. Mycologist

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Correct Option: C

Bioindicators are used for knowing

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Minerals

  2. Oxygen demand

  3. Air pollution

  4. All of the above

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Correct Option: D
Explanation:

Bioindicators are living organisms such as plants, animals, and microorganisms that are used as indicators. They are used for knowing the different content of an ecosystem such as minerals, oxygen demand, air pollution. Lichens are used for knowing air pollution. Algae bloom indicates large amount of nitrates and phosphates in lakes and rivers.

Thus, the correct answer is 'All of the above.'

The term biocoenosis' was proposed by

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Tansley

  2. Carl Mobius

  3. Warming

  4. None of the above

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Correct Option: B

The term ecology was coined by

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Linnaeus

  2. William

  3. Odum

  4. Haeckel

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Correct Option: D

Name the famous plants ecologist

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Jagdish Chandra Bose

  2. Birbal Sahani

  3. Ramdeva Misra

  4. Charles Darwin

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Correct Option: C

Statement 1 : BOD represents the amount of dissolved oxygen that would be consumed if all the organic matter in one litre of water were oxidised by microorganisms.
Statement 2 : High value of BOD indicates that water is highly polluted by organic matter.

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

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Correct Option: C
Explanation:
BOD is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature.
High BOD indicates the water is highly polluted because the dissolved oxygen is  already consumed by bacteria.
So, the correct option is 'Both statements 1 and 2 are correct'

More than ........... $\%$ of the world population live in arid or semiarid regions.

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. $40$

  2. $50$

  3. $60$

  4. $80$

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Correct Option: A
Explanation:

The arid region is a region which is characterized by a severe lack of available water. Due to lack of water, it prevents and hinders the growth and development of plant and animal life. Arid climates tend to lack vegetation. The semiarid region is partially dry or partially arid. It is intermediate between arid and humid climate. More than 40% of the world population live in arid or semiarid regions.

Thus, the correct answer is '40.'

Which of the following is absent in polluted water : -

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. Hydrilla

  2. Water hyacinth

  3. Larva of stone fly

  4. Blue green algae

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Correct Option: C
Explanation:
Stoneflies are exopterygote insects with aquatic nymphs; long antennae, biting mouthparts and a weak flight. Adults have the tendency to feed on lichens and unicellular algae. These are good pollution indicators. Stonefly (Plecoptera order) larva requires well-aerated, non-polluted water. It is absent in polluted water.

So, the correct answer is 'Larva of stonefly'.

Lichen is indicator of 

biology option c: ecology and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity

  1. $CO _2$ pollution

  2. $SO _2$ pollution

  3. CO pollution

  4. water pollution

Show answer
Correct Option: B
Explanation:

Lichen is a symbiotic association between algae and fungi known as phycobiont and mycobiont component respectively. Lichens are very good pollution indicators as they do not grow in SO$ _2$ polluted environments.

So, the correct answer is 'SO$ _2$ pollution'.