How is carbon released back into the atmosphere? 1) photosynthesis 2) Decomposition 3)ingestion 4)Respiration

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

When water freezes, it . contracts expands

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19