Tag: energy flows

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Questions Related to energy flows

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

In an ecosystem, which of the following shows one-way passage?

  1. Free energy

  2. Carbon

  3. Nitrogen

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

Energy flow is the amount of energy that flows from one trophic level to another trophic level in an ecosystem. It is unidirectional or one-way passage. In an ecosystem, flow of free energy occurs through different trophic levels. Producers or plants obtain their energy from the sun by photosynthesis. The primary consumers (herbivores) obtain their energy from the producers. The secondary consumers (carnivores) obtained their energy by using herbivores as a source of food and so on. The energy present at each successive trophic level is 10% of the previous trophic level.

Thus, the correct answer is 'Free energy.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Path of energy flow in an ecosystem is 

  1. Herbivores > Producers > Carnivores -> Decomposers

  2. Herbivores > Carnivores >Producers > Decomposers

  3. Producers > Carnivores > Herbivores > Decomposers

  4. Producers >Herbivores > Carnivores > Decomposers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ecosystem is made up of living and nonliving things. Living things or biotic things include plants and animals. Nonliving things or abiotic things include air, water, land.  It is composed of organisms interacting within communities. The driving force for an ecosystem is solar energy. Producers use solar energy to synthesize their food by the process of photosynthesis. From producers, the energy is transferred to herbivores. Herbivores eat producers. The energy is transferred from herbivores to carnivores. Carnivores eat herbivores. From carnivores, the energy is transferred to decomposers. They decompose organic matter of plants and animals.

Thus, the correct answer is 'Producers >Herbivores > Carnivores > Decomposers.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Which of the following receives the maximum energy?

  1. Producers

  2. Decomposers

  3. Primary consumers

  4. Secondary consumers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Flow of energy declines as it passes from lower to higher trophic level. The energy decreases from one trophic level to the next trophic level because energy is lost as metabolic heat during transfer of energy. When food energy passes from producers to herbivores to carnivores, only 10% of energy is transferred from one trophic level to another trophic level. Hence, producers receives the maximum energy.
Thus, the correct answer is 'Producers.'
Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Each successive trophic level has

  1. Less total energy

  2. More total energy

  3. Increased total energy

  4. Non estimated energy contents
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pyramid of energy represents the amount of energy at each trophic level. In any ecosystem, flow of energy declines as it passes from lower to higher trophic level. Hence, the pyramid of energy is always upright. Each successive trophic level has less total energy. In this, the energy decreases from one trophic level to the next trophic level because energy is lost as metabolic heat during transfer of energy. When food energy passes from producers to herbivores to carnivores, only 10% of energy is transferred from one trophic level to another trophic level.

Thus, the correct answer is 'Less total energy.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Loss of energy from one trophic level to next higher trophic level is

  1. 30%

  2. 40%

  3. 60%

  4. 90%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to the Lindeman's trophic efficiency rule, the 10% of energy is transferred from one trophic level to the next successive trophic level. The rest of the energy, that is 90% of energy is lost during transfer of energy from one trophic level to next higher trophic level. The first trophic level has the maximum energy. 

Thus, the correct answer is '90%.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Ten percent law of energy transfer in food chains was given by

  1. Elton

  2. Haeckel

  3. Lindeman

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

Ten percent law of energy transfer in food chains was given by Reymond LIndeman. It is also called as Lindeman's trophic efficiency rule. According to this rule, the 10% of transfer of energy is transferred from one trophic level to the next successive trophic level. The rest of the energy is lost during transfer of energy and during respiration. The first trophic level has the maximum energy. 

Thus, the correct answer is 'Lindeman.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

10% law of energy transfer in food chain was given by

  1. Elton

  2. Schimper

  3. Haeckel

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

Ten percent law of energy transfer in food chains was given by Reymond LIndeman. It is also called as Lindeman's trophic efficiency rule. According to this rule, the 10% of transfer of energy is transferred from one trophic level to the next successive trophic level. The rest of the energy is lost during transfer of energy and during respiration. The first trophic level has the maximum energy. 

Thus, the correct answer is 'Lindeman.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

In a food chain, energy flows

  1. From low to high level

  2. From high to low level

  3. From low to middle level

  4. From middle to low level
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a food chain, energy enters through producers. Producers such as plants synthesize their own food in presence of sunlight. They convert solar energy into chemical energy. From producers, the energy flows to the primary consumers to the secondary consumers to the tertiary consumer. Hence, the energy flow in a food chain is always from low to high level. During energy transfer, only 10% of energy is transferred from one trophic level to another trophic level.

Thus, the correct answer is 'From low to high level.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Lindemans energy transfer law states that only

  1. 20% energy is transferred to higher trophic level

  2. 10% energy is transferred to higher trophic level

  3. 30% energy is transferred to higher trophic level

  4. 50% energy is transferred to higher trophic level
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ten percent law of energy transfer in food chains was given by Reymond LIndeman. It is also called as Lindeman's trophic efficiency rule. According to this rule, the 10% of transfer of energy is transferred from one trophic level to the next successive trophic level. The rest of the energy is lost during transfer of energy and during respiration. The first trophic level has the maximum energy. 

Thus, the correct answer is '10% energy is transferred to higher trophic level.'

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

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

  1. II and III only

  2. III and IV only

  3. I and IV only

  4. I and II only

  5. I, II and III only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement II is false because the grazing food chain is often the major conduit in aquatic ecosystems, while the detritus food chain is more significant in terrestrial ecosystems. Statement III is false because the detritus food chain is the major conduit in terrestrial ecosystems.