Introduction to Energy Flow

Q.

Energy flow in an ecosystem is _____ .

1. Multidirectional

2. Unidirectional

3. Indeterminate

4. Bidirectional

Q.

Energy flow in an ecosystem is _____ .

1. Unidirectional

2. Indeterminate

3. Bidirectional

4. Multidirectional

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

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

Q. Matter flow in an ecosystem is ___.

1. Cyclical
2. Unidirectional
3. Random
4. Bidirectional

Q. An ecosystem requires only one external input and that is:

1. Soil
2. Water
3. Solar energy
4. Air

Q. Regarding assertion and reason, choose the right option
Assertion [A] - The earth is a closed system with respect to matter and open with respect to energy.
Reason [R] - Energy is not recycled in an ecosystem.

1. Both A and R are true R does not explain A
2. A is true and R is false
3. Both A and R are false
4. Both A and R are true and R explains A

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

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

Q. Regarding assertion and reason, choose the right option
Assertion [A] - The earth is a closed system with respect to matter and open with respect to energy.
Reason [R] - Energy is not recycled in an ecosystem.

1. Both A and R are true R does not explain A
2. Both A and R are true and R explains A
3. A is true and R is false
4. Both A and R are false

Q. Matter flow in an ecosystem is ___.

1. Bidirectional
2. Cyclical
3. Unidirectional
4. Random

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

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