Tag: evs - i

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Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

If a grassland food chain is linked to the food chain in the forest. It can be termed as

  1. Ecosystem

  2. Food chain

  3. Food web

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When different food chains from different ecosystems (like grassland and forest) interact or overlap, the resulting complex network is described as a food web.

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Which of the following statement defines the difference between the food chain and food web?

  1. Food chain demonstrates the interdependence.

  2. Food web demonstrates the interlinked food chain.

  3. Food chain is an exchange of energy.

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A food chain is a single linear path of energy flow, whereas a food web is a collection of many interlinked food chains that better represent the complexity of an ecosystem.

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Extinction of a species in a food chain is compensated in

  1. Ecological pyramid

  2. Food web

  3. Food chain

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Food web is interconnected food chains in an ecosystem. Extinction of a species in a food chain is compensated in food web. When a particular species in a food chain becomes extinct, it is compensated by the remaining generalized species at the same trophic level.

Thus, the correct answer is 'Food web.'

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Networking of different food chains in an ecosystem provides

  1. Stability

  2. Instability

  3. Origin of new species

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Food web is constituted by various interlinked food chains in a community. Networking of different food chains in an ecosystem provides stability to the ecosystem. Due to interconnecting food chains, relationships between the species remain constant over relatively long periods of time.

Thus, the correct answer is 'Stability.'

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

A group of interconnected food chains is called

  1. complex food chain

  2. food web

  3. food cycle

  4. pyramid of biomass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A web of interconnected food chains is known as food web.

The food web has various interdependent food chains and establishes ecological balance.
So, the correct option is 'food web'.

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Which is not true about a complex food web?

  1. Populations tend to remain about the same size

  2. Energy levels remain about the same for all trophic levels

  3. Inputs are constant and outputs are minimal except for heat

  4. Most of the energy entering the system maintains the whole community
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10% of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat. Food webs illustrate how energy flows through ecosystems, including how efficiently organisms acquire and use it. Autotrophs, producers in food webs, can be photosynthetic or chemosynthetic. They use light energy to synthesize their own food, while chemoautotrophs use inorganic molecules. Heterotrophs cannot synthesize their own energy, but must obtain it from autotrophs in food webs.

So the correct option is 'energy levels remain about the same for all trophic levels.' 

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

If we weighed all of the organisms at each level of this food web, which would be the heaviest?

  1. Grass and trees

  2. Grasshoppers and squirrels

  3. Hawks and foxes

  4. All levels would weigh the same
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem. All of the interconnected and overlapping food chains in an ecosystem make up a food web.  An ecosystem cannot support a large number of omnivores without supporting an even larger number of herbivores, and an even larger number of autotrophs and hence the biomass of autotrophs will be the heaviest as it present in abundant amount..

So the correct option is 'grass and trees'.

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

The interlocking pattern of various food chains is referred as food web.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In nature, some organisms operate in the ecosystem not just at a single trophic level but more than one trophic levels which means that it may derive its food from more than one source. The organism may get eaten itself by another organism of higher trophic level. It may also feed on different organisms of lower trophic levels. In this way, various food chains are linked together in an ecosystem and the intersection of these food chains form a complex network called food web. 

Hence, the statement given in the question is correct.
So, the correct answer is 'True'.

Multiple choice evs - i insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

The study of food chains and food webs is observed in the phenomenon known as

  1. biological chain

  2. ecosystem

  3. biological magnification

  4. energy flow
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biological magnification (or biomagnification) refers to the increasing concentration of substances, such as toxic chemicals, at higher trophic levels of a food chain or food web.