Cyanobacteria are important to the evolution and advancements of other life on earth because they
a) were the first life form on earth.
b) produced oxygen from photosynthesis.
c) were the first group of organisms to leave a fossil record.
d) were thought to have become mitochondria in the cells of animals.

Trees with light brown bark dominate an ecosystem the ecosystem has populations of insects that thrive on the tree bark over time some insect species developed certain physical characteristics that them thrive on the tree bark these physical characteristics also the insects defend themselves from predators which insect species is probaly the species with the new physical characteristics?