AP BIOLOGY

ECOLOGY

ENERGY FLOW AND THE FOOD CHAIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In a model of a food web, decomposers ____
A
can get energy from organisms
B
always come after consumers
C
are between producers and consumers
D
return all energy to the sun
Explanation: 

Detailed explanation-1: -Fungi and bacteria are the key decomposers in many ecosystems; they use the chemical energy in dead matter and wastes to fuel their metabolic processes.

Detailed explanation-2: -Consumers (e.g. animals) get their energy by eating the producers and/or other consumers. Scavengers and decomposers get their energy by eating dead plants or animals. Rotting food (or food that’s gone ‘bad’) doesn’t look or smell great but it contains a wealth of nutrients, including carbon, nitrogen, and phosphorous.

Detailed explanation-3: -Decomposers, like fungi and bacteria, complete the food chain. Decomposers turn organic wastes, such as decaying plants, into inorganic materials, such as nutrient-rich soil. They complete the cycle of life, returning nutrients to the soil or oceans for use by autotrophs. This starts a whole new series of food chains.

Detailed explanation-4: -How Organisms Acquire Energy in a Food Web. Energy is acquired by living things in three ways: photosynthesis, chemosynthesis, and the consumption and digestion of other living or previously living organisms by heterotrophs.

Detailed explanation-5: -Decomposers get nutrients and energy by breaking down dead organisms and animal wastes. Through this process, decomposers release nutrients, such as carbon and nitrogen, back into the environment. These nutrients are passed to other organisms when they are eaten or consumed.

There is 1 question to complete.