Question

Which statement BEST describes how matter moves within and between ecosystems? A. Matter flows in a one-way direction through food chains and food webs. B. Matter cycles between trophic levels in food chains and food webs. C. Matter is made and destroyed as it is used by living things. D. Matter cycles through food webs and biogeochemical cycles.

Answer 1

Answer: Option D

Step-by-step explanation:

The matter is recycled through biogeochemical cycle and food web. The producers make food by the help of the process photosynthesis.

The food is eaten by animals. Then after completing their life cycle plants and animal die.

The died plants and animal eat up the decomposer which is present at every level of food web.They recycle the matter back into the soil.

The biogeochemical cycle helps in recycling the carbon, nitrogen phosphorous on earth. There is a continuous movement of matter on earth.

hence, the matter is recycled through the food web and biogeochemical cycle.

Answer 2

The answer is; B

When autotrophs and chemotrophs (primary producers) covert abiotic factors to biotic elements, this energy are passed up the food chain and food web through interaction with other organisms. These interactions include predation and parasitism. Since matter and energy cannot be destroyed or created, it is only cycled through the trophic levels. In the transfer of this matter/energy from one trophic level to another, most of the energy is lost in the environment through inefficiencies.