Microscopic fossils, or of single celled prokaryotic organisms that resemble modern bacteria have been found in rocks more than 3.5 billion years old.

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Solutions to environmental problems in europe must

Moving down the ramp from 6 meters to