Question

autotrophs can be classified into two groups according to which of these properties? * 2 points
energy source, either sunlight or chemicals
food type, either plant matter or animal matter
food quality, either living matter or dead matter
water quality, either fresh water or salt water
which statement best describes how matter moves within and between ecosystems? * 2 points
matter flows in a one - way direction through food chains and food webs.
matter cycles between trophic levels in food chains and food webs.
matter is made and destroyed as it is used by living things.
matter cycles through food webs and biogeochemical cycles.

Explanation:

Autotrophs are organisms that can produce their own food. Photo - autotrophs use sunlight as an energy source, while chemo - autotrophs use chemicals. Matter in ecosystems cycles through food webs and biogeochemical cycles like the carbon, nitrogen, and water cycles. It is not created or destroyed (law of conservation of matter) and does not flow in a one - way direction like energy in food chains.

Answer:

First question: energy source, either sunlight or chemicals
Second question: Matter cycles through food webs and biogeochemical cycles.