AP BIOLOGY

ECOLOGY

ENERGY FLOW AND PRIMARY PRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When energy flows through an ecosystem, some energy is transferred and some energy is lost as heat. For instance, when a deer eats grass it is gaining energy from the grass. How much energy is passed from the grass to the deer?
A
10%
B
20%
C
90%
D
100%
Explanation: 

Detailed explanation-1: -Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.

Detailed explanation-2: -Energy that is not used in an ecosystem is eventually lost as heat. Energy and nutrients are passed around through the food chain, when one organism eats another organism. Any energy remaining in a dead organism is consumed by decomposers.

Detailed explanation-3: -The energy flow is the amount of energy that moves along the food chain. This energy flow is also known as calorific flow.

Detailed explanation-4: -Transfer of energy in an ecosystem follow 10% law, i.e., only 10% energy is transferred from one trophic level to higher trophic level. So, if lion feeds on deer than 10 kg of deer’ meat will form 1 kg of lions; s flesh.

There is 1 question to complete.