Tag: ecosystem

Questions Related to ecosystem

Aquatic photodiffraction produces zones, like

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Euphotic, disphotic and disaphotic

  2. Aphotic, euphotic and disphotic

  3. Euphotic, aphotic and disphotic

  4. Euphotic, disphotic and aphotic

Show answer
Correct Option: D
Explanation:

The photic zone or euphotic zone is the depth of the water in a lake or ocean, that is exposed to such intensity of light at which the rate of oxygen consumption, is equal to the rate of carbon dioxide production. It extends from the surface down to a depth where light intensity falls to one percent of that at the surface, called the euphotic depth. About 90% of all marine life lives in the euphotic zone.

The zone which extends from the base of the euphotic zone to about 200 metres is called as the disphotic zone. While there is some light, it is insufficient for photosynthesis. The euphotic zone together with the disphotic zone coincides with the epipelagic zone. The bottommost zone, below the euphotic zone, is called as the aphotic zone. Most deep ocean waters belong to this zone.

Benthos of pond ecosystem are

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Producers

  2. Primary consumers

  3. Secondary consumers

  4. Tertiary consumers

Show answer
Correct Option: B
Explanation:

Benthos are the organisms found at the bottom of freshwater bodies such as lakes, rivers, and streams and since light cannot reach such deep water, therefore, they depend upon organic matter. This dead and decaying matter sustain their food chain hence, they are mostly scavengers or detritivores, belonging to primary consumers of detritus food chain.

So, the correct answer is option B.

Organisms living at the bottom of a lake are

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Nekton

  2. Benthos

  3. Plankton

  4. Pelagic

Show answer
Correct Option: B

Abyssal zone in ocean has

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. No sunlight but contains consumers and decomposers

  2. No sunlight but contains producers

  3. No sunlight but contains living beings

  4. Sunlight as well as producers

Show answer
Correct Option: A

Profundal zone is

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Aphotic zone in deep water

  2. Euphotic zone in open water

  3. Disphotic zone in deep water

  4. Dark bottom of deep water body

Show answer
Correct Option: A

Benthoic animals lives 

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Deep in sea

  2. Floating

  3. Submerged

  4. Active swimmers

Show answer
Correct Option: A

Which of the following supports a dense population of plankton and littoral vegetation?

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Oligotrophic condition

  2. Eutrophic condition

  3. Lithotrophic condition

  4. Agroecotrophic condition

Show answer
Correct Option: B
Explanation:

Ponds and lakes are stationary fresh water ecosystems. Ponds are generally shallower with depth less than 2 meters. Shallow lakes are eutrophic with rich biota and quick circulation of nutrients. Producers in a pond or lake ecosystem include phytoplanktons like diatoms, desmids, Chlorella, Chlamydomonas, Spirogyra, Chlamydomonas, Oedogonium etc. Littoral zones occur on the edge of large lakes and rivers, having dense growth of vegetation. Therefore, the correct answer is option B.

Littoral zone is found along

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. High mountain

  2. Sea

  3. River

  4. Desert

Show answer
Correct Option: B
Explanation:

1) The zone at the edge of a lake or sea or in an aquatic habitat which is alternatively exposed to air is called 'Littoral zone'.

2) Therefore, sunlight is also available here which penetrates to the sediment level and immersed in water, which helps and allow to grow aquatic plants.
3) This coastal zone is rich producers from the surface to bottom, with a large number green alga
4) Organisms which are mobile such as crabs, snails, limpets are usually found in these areas.
So, the correct answer is 'Sea'

Aquatic photodiffraction produces zones

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Euphotic, disphotic and aphotic

  2. Aphotic, euphotic and disphotic

  3. Euphotic, aphotic and disphotic

  4. Disphotic, aphotic and euphotic

Show answer
Correct Option: A

Metalimnion is _____________.

zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

  1. Aphotic region of a deep lake

  2. Middle transitional zone

  3. Upper part subject to temperature fluctuations

  4. Lower part where water temperature is low

Show answer
Correct Option: A