Tag: adaptations to aquatic habitat

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Questions Related to adaptations to aquatic habitat

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

Aquatic photodiffraction produces zones, like

  1. Euphotic, disphotic and disaphotic

  2. Aphotic, euphotic and disphotic

  3. Euphotic, aphotic and disphotic

  4. Euphotic, disphotic and aphotic
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Benthos of pond ecosystem are

  1. Producers

  2. Primary consumers

  3. Secondary consumers

  4. Tertiary consumers
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Abyssal zone in ocean has

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The abyssal zone is the deep ocean layer where sunlight does not penetrate, meaning photosynthesis cannot occur. It relies on organic matter falling from above to support consumers and decomposers.

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

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

  1. Oligotrophic condition

  2. Eutrophic condition

  3. Lithotrophic condition

  4. Agroecotrophic condition
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Littoral zone is found along

  1. High mountain

  2. Sea

  3. River

  4. Desert
Reveal answer Fill a bubble to check yourself
B Correct answer
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'

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

Aquatic photodiffraction produces zones

  1. Euphotic, disphotic and aphotic

  2. Aphotic, euphotic and disphotic

  3. Euphotic, aphotic and disphotic

  4. Disphotic, aphotic and euphotic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aquatic light penetration creates three distinct zones. The euphotic zone receives sufficient light for photosynthesis. The disphotic zone receives some light but insufficient for photosynthesis. The aphotic zone receives no sunlight at all. This order from surface to depth is fundamental to aquatic ecosystem structure.