Introduction to Energy Flow

Q.

What are the characteristics of an ideal ecosystem?

Q.

Give an account of energy flow in an ecosystem.

Q. Matter flow in an ecosystem is ___.

1. Bidirectional
2. Unidirectional
3. Both (a) and (b)
4. All around

Q.

What is the ultimate source of energy for the ecosystems?

Q.

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

1. Less than 1%

2. 30%

3. Upto 2%

4. 50%

Q.

All energy on the earth originally comes from the sun.

1. True
2. False

Q.

___ is the chief source to all forms of energies.

Q. Energy flow and energy transformations in living systems strictly confirm to the:

1. Liebig's law of minimum
2. Laws of thermodynamics
3. Shelford's law of tolerance
4. Law of limiting factors

Q.

Flow of energy through various trophic levels in an ecosystem is unidirectional and non-cycle. Explain.

Q.

Energy flow in an ecosystem is _____ .

1. Bidirectional

2. Multidirectional

3. Unidirectional

4. Indeterminate

Q. At each trophic level, in which form is the energy lost?

1. Heat
2. Chemical
3. None of the above
4. Light

Q. Trophic level of food chain having greatest amount of energy is

1. Carnivores
2. Herbivores
3. Autotrophs
4. Saprophytes

Q. Major conduit of energy in land and aquatic ecosystem is transferred through .............. and ............ respectively.

1. GFC, DFC
2. PFC , GFC
3. DFC, GFC
4. GFC, GF

Q. Short / Long Answer Type Questions :
Explain, why in an ecosystem energy is said to flow while nutrients are said to cycle

Q. Is there any limitation in number of trophic levels in detritus food chain. Does it follow 10% energy law or not?

Q.

Energy flow from one trophic level to another in an ecosystem is

1. (a) 5%

2. (b) 10%

3. (c) 15%

4. (d) 20%

Q.

what are the essential features of an ecosystem ?

Q. In an ecosystem, which of the following shows one way passage

1. Nitrogen
2. Free energy
3. Potassium
4. Carbon

Q.

Energy flow in an ecosystem is _____ .

1. Bidirectional

2. Multidirectional

3. Unidirectional

4. Indeterminate

Q. Ten percent of energy gets transferred in food chain, this is enuciated by

1. Lindeman
2. Haeckel
3. Schimper
4. Zernicke

Q. Trophic level of food chain having greatest amount of energy is

1. Carnivores
2. Herbivores
3. Autotrophs
4. Saprophytes

Q. State whether true or false.
The energy flow in an ecosystem is based on the primary productivity of autotrophs.

1. True
2. False

Q.

The Sun is the ultimate source of energy comment

Q. Which of the following statements is/are true for an natural ecosystem?

1. Energy flow only through natural ecosystems
2. Nutrients flow only through natural ecosystems
3. Natural ecosystems include living and non living material
4. There is no heat energy loss from natural ecosystems

Q. In an ecosystem, the 10% of energy is transferred from one trophic level to the next in the form of

1. heat energy
2. light energy
3. chemical energy
4. mechanical energy

Q. At each trophic level, in which form is the energy lost?

1. Heat
2. Chemical
3. Light
4. None of the above

Q. 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

1. 10%
2. 25%
3. 5%
4. 50%

Q. The maximum fixation of solar energy is done by __

1. Fungi
2. Protozoa
3. Bacteria
4. Green Plants

Q. The importance of ecosystem lies in

1. Flow of energy
2. Cycling of nutrients
3. Both (A) and (B)
4. None of the above

Q. In an ecosystem, energy is dissipated as _______ energy which cannot be recycled.

1. light
2. chemical
3. heat
4. mechanical