AP BIOLOGY

ECOLOGY

ENERGY FLOW AND THE FOOD CHAIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is meant by trophic levels?
A
a sequence of steps that shows one pathway for energy flow from organism to organism
B
the position an organism holds in the food chain
C
a network of many trophic level pyramids
D
a network of many food chains
Explanation: 

Detailed explanation-1: -The trophic level of an organism is the position it occupies in a food web. A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The trophic level of an organism is the number of steps it is from the start of the chain.

Detailed explanation-2: -trophic level, step in a nutritive series, or food chain, of an ecosystem. The organisms of a chain are classified into these levels on the basis of their feeding behaviour. The first and lowest level contains the producers, green plants.

Detailed explanation-3: -The trophic levels are the positions of organisms on a food chain. They represents a step wise transfer of energy through food, in an ecosystem. The lowest level of a trophic level is occupied by producers. Producers are consumed by primary consumers i.e herbivores and they occupy the second trophic level.

Detailed explanation-4: -one of three positions on the food chain: autotrophs (first), herbivores (second), and carnivores and omnivores (third).

There is 1 question to complete.