Meaning of an ecosystem - class-XI
Description: meaning of an ecosystem | |
Number of Questions: 75 | |
Created by: Gagan Singh | |
Tags: evs forests: our life line botany biology evs - i ecosystem : structure and function ecosystem environmental balance magnificence of trees diversity for sustenance food chain ecology and environment living in harmony ecology our environment: energy flow in the ecosystem zoology insectivorous plants geography the biosphere energy flow in an ecosystem habitat our environment |
Which of the following is an advantage of depredation
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,
Which of the following best describes a tropical region?
Which of the following belongs to the category of primary consumers?
Identify which one of the following is an example of incomplete ecosystem?
Trophic levels are formed by
If bamboo plant is growing in a far forest then what will be its trophic level?
The zooplanktonic forms are
A rat feeding upon potato tuber is
Trophic levels in a food chain are formed by
Food web is constituted by
A food chain can have trophic levels
Food levels of an ecosystem are known as
In general, food webs consist of producers, consumers, and decomposers.
Food web ensures survival of all types of trophic levels.
An example of a producer in the aquatic food web would be
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
Trophic levels are formed by-
Each step in a food chain is called a
Which pair is not correctly related?
Which one occupies more than one trophic level in a pond ecosystem?
Grass $\rightarrow$ Goat $\rightarrow$ Man $\rightarrow$
In above food chain man is
Which of the following trophics level is occupied by man feeding on curd?
Food web usually exists in ecosystem which
The trophic level of lion in a forest ecosystem is:
Food web contains many _______.
A food web is
When number of food chains is interlocked this is called
Trophic levels are formed by
Vultures in an ecosystem are
What is true about any ecosystem?
If bamboo plant is growing in a forest, then what will be the trophic level of it?
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
In an ecosystem, trophic level of man is
More than one interconnected food chain in a region forms
A group of interconnected food chains is called as a
Trophic levels are formed by_______________
Organisms of the same trophic level are______________
Food webs can be constructed to describe
Trophic levels in ecosystem is formed by
Which of the following trophic levels includes a bird feeding on both insects and berries?
All of the following organisms are correctly paired with their trophic level except
Which of the following best describes the trophic level within an ecosystem?
The base of the food web in marine ecosystem is
Which of the following limits the number of trophic levels maintained by an ecosystem?
All organisms that feed at each other link in a food chain comprise a ______.
Which of the following is false?
In a food chain, deer is eaten by lion and deer east vegetation. Which one of the statements given is true?
(P) Lion is second order consumer and deer is first order consumer.
(Q) Lion is predator and deer is prey.
(R) Lion is first order consumer and deer is second order consumer.
(S) Lion is third order consumer and deer is second order consumer.
If a grassland food chain is linked to the food chain in the forest. It can be termed as
Which of the following statement defines the difference between the food chain and food web?
A peacock eats snakes which eat frogs. These eat hoppers which in turn thrive on leaves of the plants. The peacock is
Extinction of a species in a food chain is compensated in
Which of the following statements about food chains are correct?
(a) Removal of 80% tigers resulted in increased growth of vegetation.
(b) Removal of most carnivores resulted in an increased population of deer.
(c) Length of the food chain is limited to 3-4 trophic levels due to energy loss.
(d) Length of the food chain may vary from 2-3 trophic levels.
Networking of different food chains in an ecosystem provides
Which of the following occupies more than one trophic level in the same ecosystem at the same time?
Which of the following may occupy any trophic level in an ecosystem?
A group of interconnected food chains is called
Trophic levels are formed by:
Which is not true about a complex food web?
If we weighed all of the organisms at each level of this food web, which would be the heaviest?
Energy flow in an ecosystem begins with
Humans and animals such as bears are biologically adapted to be
Of the total amount of energy that passes from one trophic level to another, about 10% is
The interlocking pattern of various food chains is referred as food web.
Trophic levels in ecosystem are formed by
In an aquatic ecosystem , a mollusc typically belongs to
The study of food chains and food webs is observed in the phenomenon known as
In oceans, food web is involved in more species, than
A dependent, on producers for their food is called
In which of the following countries Slow Food Movement took place to combat fast food?
Tree $\rightarrow$ Caterpillar $\rightarrow$ Robin $\rightarrow$ Cat represents a food chain. In this food chain, if the tree can provide 100000 calories of energy, how much calories of energy will be available to the robin and the cat?
In an aqueous environment, microscopic animals and plants are collectively known as
What is correct about food chain and food web?
The concept of trophic structure of a community emphasizes the