Which statement best describes why carbon is the key element in organic compounds?
carbon is extremely reactive and must form bonds for stability.
carbon is the most abundant element in the universe.
carbon is the least reactive element on the periodic table.
carbon has a strong tendency to form chains or rings.,

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.

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?