Energy flow in a food chain - class-XII
Description: energy flow in a food chain | |
Number of Questions: 79 | |
Created by: Sangita Pandit | |
Tags: ecosystems primary concept of force and energy our environment - our concern ecosystem conservation of environment ecology and environment our environment environmental management zoology physics meaning of life our environment: energy flow in the ecosystem biology |
A freshwater organism cannot survive in a water body that has grater ......... that its original habit.
The trophic efficiency of producers, herbivores and carnivores are respectively
Ten percent of energy gets transferred in food chain, this is enuciated by
Ecosystem dynamics is governed by
The energy flow in an ecosystem is
According to a pyramid of production, approximately what percent of the energy at a trophic level is transferred to the next trophic level?
The best source of energy in the environment is
10% law of flow of energy in ecosystem was proposed by
Inorganic element that changes food into usable energy is
Energy enters an ecosystem through
Transfer of energy in different trophic levels of an ecosystem is
Amount of energy transferred from one trophic level to next is
Efficiency of energy transfer from one trophic level to the higher trophic level is called
The amount of usable energy remains constant as it is passed from one trophic level to another.
The maximum energy is stored at following trophical level in any ecosystem
The energy within an ecosystem is fixed and never changes.
If $5$ joules of energy is available at producer level then find the energy transferred to the lion in the following food chain.
Plants $\rightarrow$ Deer $\rightarrow$ Lion
Grass $\rightarrow$ Deer $\rightarrow$ Tiger
In this food chain, the biomass of grass is $1$ tonne. The tiger biomass will be:
An ecosystem is maintained by the flow of energy derived from the Sun. Energy trapped by plants varies from ecosystem to ecosystem. The table given shows energy absorption by different vegetations of different ecosystem.
Vegetation | $\%$ of energy absorption |
---|---|
a) Aquatic ecosystem | $15-16\%$ |
b) Grassland | $14-15\%$ |
c) Mixed forest | $13-14\%$ |
d) Modern $C _3$ crops | $12-13\%$ |
e) Modern $C _4$ crops | $10-12\%$ |
Find the correct match.
The pyramid of energy is the best representation of an ecosystem because it indicates
The cost of other ecosystem services like recreation and nutrient cycling are?
The importance of ecosystem maintenance lies in
Which of the cycle is concerned with energy flow in the ecosystem?
One way cycle is
The transfer of energy from a level to another is governed by Law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores level is
10% energy transfer law in food chain was first given by
The study of energy transfer in an ecosystem at different trophic levels is known as
Percentage energy transferred to higher trophic level in food chain is
The pyramid of number of individuals per unit area in grassland ecosystem will be
A component of physical environment of an ecosystem is
About how much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?
10% law of energy transfer was given by
Which of the following is the correct order of flow of energy?
If first trophic level represent 100,000 kcal of energy. According to Lindman's law, how much energy is available to the fourth trophic level?
Autotrophic species produce 400,000 kJ of energy in a tropical food web. The amount of energy at the level of secondary consumers is
Find the incorrect statement about the energy flow through an ecosystem?
If the energy produced by plants is 800,000 kJ, then how much energy will exist at the level of secondary consumers?
According to Lindeman's 10% law, only 10% energy is transferred to the next trophic level. If the plants produce 100 units of energy, the amount of energy at the level of secondary consumers would be
Only a small portion of chemical energy in an apple is transferred to an organism that eats it.
What happens to the majority of the chemical energy stored in the apple when another organism eats it?
Maintenance of internal favourable conditions, despite changes in external environment is
The movement of energy and nutrients through living systems differs in what way?
Which best describes the movement of energy and matter through living systems?
Which one of the following is one way cycle?
Flow of energy declines from low to higher trophic level in ecosystem, is mainly explained by
The importance of ecosystem lies in
Select correct answers :
(1) Flow of energy
(2) Flow of materials
(3) Flow information
(4) Flow of smoke
In terrestrial ecosystem, maximum energy is present in
What percent of assimilated energy is used in respiration by the herbivores?
In an ecosystem, which of the following shows one-way passage?
Path of energy flow in an ecosystem is
Which of the following receives the maximum energy?
Each successive trophic level has
Loss of energy from one trophic level to next higher trophic level is
Ten percent law of energy transfer in food chains was given by
10% law of energy transfer in food chain was given by
In a food chain, energy flows
Lindemans energy transfer law states that only
Which of the following statements regarding energy flow is/are false?
I. Detritus food chain begins with dead organic matter
II. In aquatic ecosystem, detritus food chain is the major conduit for energy flow
III. In terrestrial ecosystem a larger fraction of energy flows through grazing food chain
IV. Producers belong to the first trophic level of the food chain
The energy required daily by hunter- gatherer humans was:
As biomass passes from one trophic level to another, the amount of total energy
In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
Bioenergetics can be defined as the process of energy transfer between trophic levels
Energy recycling is an important part of every ecosystem
Choose the correct answers from the alternatives given .
Which of the following forms of energy is not correctly matched?
Choose the correct answers from the alternatives given .
Diffuse, disorganised forms of energy
The energy flows from autotroph to the heterotrophs.
Ecosystem is not accepted by which law of thermodynamics ?
Energy of motion is also known as:
Two objects, A and B, have the same mass but the specific heat of A is larger than B. If both objects absorb equal amounts of energy,
Energy transformation through the food chain is
What is an average incident energy?
The correct sequence of components through which energy may pass from initial source, through an ecosystem is
Energy transfer from one trophic level to another is
Flow of energy declines as it passes from lower to higher trophic level. This is explained by
Consider the components of a food chain producers $ \rightarrow\ $ herbivores $ \rightarrow\ $ carnivores $ \rightarrow\ $ top carnivores. Eventually what happens to all the energy passed from one element to the next?
The only requirement of an ecosystem is a constant input of energy that comes by the process of respiration
Read the following statements carefully:
(I) Energy transfer in the biotic world always proceeds from the autotrophs.
(II) Energy flow in undirectional
(III) Energy availability is maximum at the tertiary level.
(IV) There is loss of energy from one trophic level to that other.
Select the relevant statements for the forest ecosystem.