AP BIOLOGY

ECOLOGY

ENERGY FLOW AND PRIMARY PRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Suppose that a llama is hit by a truck and dies. Where will most of the biological matter in the llama go next?
A
To top level predatory animals
B
To the soil to be used by plants
C
To first order consumers that might eat the llama
D
To microorganisms that decompose and recycle matter
Explanation: 

Detailed explanation-1: -3.1 The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

Detailed explanation-2: -The bottom and largest level of the pyramid is the producers and contains the largest amount of energy. As you move up the pyramid, through the trophic levels to primary, secondary and tertiary consumers, the amount of energy decreases and the levels become smaller.

Detailed explanation-3: -Unlike energy, matter is recycled in ecosystems. Decomposers release nutrients when they break down dead organisms. nutrients are taken up by plants through their roots. nutrients pass to primary consumers when they eat the plants.

Detailed explanation-4: -In most natural ecosystems energy comes from the sun, it is consumed by producers. It is then passed on to successive trophic levels in the form of food. Hence, energy flows from the prey to the predator, not in the reverse direction.

There is 1 question to complete.