Cyanobacteria are thought to have introduced oxygen into the early atmosphere. This was important because oxygen played a key role in . creating an ozone layer to shield life from UV rays the evolution of eukaryotic organisms the greenhouse effect recycling of essential materials the water cycle

What are the probable phenotypes of their offspring

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.

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?