What are the 3 major graphs in Biology?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

When analyzing tree rings, what do scientists assume a thin ring indicates?