Tag: components of environment and their interdependencies

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Questions Related to components of environment and their interdependencies

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

Which of the following is an advantage of depredation 

  1. It serves as conduits for energy transfer across tropic levels

  2. It keeps population of organism of lower trophic level under control

  3. Predators help in maintain species diversity in a community, by reducing the intensity of competition among competing prey species

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most pastures are already under substantial grazing pressure, in effect forcing sheep to steeper and less productive pastures. An important long-term goal is to improve forage conditions for native prey species to help reduce depredation pressures on domestic stock.

So, the correct option is 'All of these'.

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

The concentration of polychlorinated biphenyls (PCB, an organochloride contaminant) in many fish populations has been declining, since a ban on their production was instituted in the late 1970s. PCBs remain a potential problem, however, because they are lipophilic and are known to biomagnify. Based on this knowledge, 

What type of fish expected to be safest for human consumption?

  1. Piscivorous fish species (i.e., which eat other fish)

  2. Benthivorous fish species (i.e., which eat invertebrates on the lake bottom)

  3. Small (young) fish

  4. Fish species with high fat content
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy metals and persistent pesticides (e.g., organochlorine of chlorinated hydrocabons like DDT) pass into food chain and increase in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat, This phenomenon is called biomagnification. Therefore, lower the trophic level of fish (such as small fish), lesser will be the biomagnification and hence safer it will be for consumption.

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

Which of the following belongs to the category of primary consumers?

  1. Snakes

  2. Water insects

  3. Eagle

  4. Cattle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The consumers in an ecosystem are heterotrophs, mostly animals which feed on other organisms. Consumers are also called as phagotrophs, as they ingest food. Consumers can be first order consumers, e.g., herbivores, cattle, rabbit, deer, insects like grasshopper etc. They feed on producers. Primary carnivores are second order consumers. They feed on herbivores. Secondary carnivores are third order consumers which feed on primary carnivores. For example, Small fish and water insects like scavenger beetles that feed on the crustaceans. 

Thus, the correct answer is option D.

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

Identify which one of the following is an example of incomplete ecosystem?

  1. Grassland

  2. Cave

  3. River

  4. Wetland
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An ecosystem is a segment of nature or biosphere consisting of a community of living beings and the abiotic or physical environment, both interacting and exchanging materials between them. An ecosystem which lacks one or the other component is called as an 'Incomplete ecosystem', e.g., sea bottom and caves where sunlight may not reach and consequently photoautotrophs or green plants may not flourish; freshly formed rain water pond where plants may not have well settled and a pond formed in rains may be temporary also.

Thus, the correct answer is option B.

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

Trophic levels are formed by

  1. Organisms linked in food chain

  2. Only plants

  3. Only animals

  4. Only carnivores
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Food chain is the sequence of organisms through which food and energy is passed in an ecosystem with the members of trophic level. Trophic level is the hierarchical levels in an ecosystem which consists organism

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

If bamboo plant is growing in a far forest then what will be its trophic level?

  1. First

  2. Second

  3. Third

  4. Fourth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trophic levels are steps or divisions of food chain characterised by the specific method of obtaining food. Producers belong to first trophic level, herbivores to second trophic level and carnivores to third trophic level. Bamboo plant, which is a producer will belong to first trophic level. It will capture solar energy for other organisms living in the forest. Thus, the correct answer is option A.

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

The zooplanktonic forms are

  1. Primary consumers

  2. Secondary consumers

  3. Carnivores

  4. Primary producers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a pond or lake ecosystem, zooplanktons (ciliates, flagellates, rotifers, small crustaceans, like Cyclops and Daphnia larvae) are directly dependent on phytoplanktons. Thus, the correct answer is option A.

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

A rat feeding upon potato tuber is

  1. Producer

  2. Carnivore

  3. Decomposer

  4. Primary consumer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rat is a herbivore animal, who used to eat plant products. The potato plant is a producer who trap solar energy and produces food (carbohydrates), which are stored in potato tubers. The rat cannot produces their own food by the use of solar energy and hence, feeds on potato tuber for his life processes.

Thus, the correct answer is option D.

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

Trophic levels in a food chain are formed by

  1. Producers

  2. Consumers

  3. Decomposers

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A food chain is series of plants/animals which are interrelated in the form of organism being eaten as food by the other. Trophic levels in a food chain are formed by producers, consumers and decomposers. In the given food chain, plants are producers. The animals eating plants are called as primary consumers and animals eating primary consumers are called as secondary consumers. Decomposers are those which decomposes the waster organic matter and release energy back in the environment.
Thus, the correct answer is 'All of the above.'