Cyanobacteria are oxygenic photosynthetic bacteria. They harvest the sun's energy, absorb carbon dioxide, and emit oxygen. Like plants and algae, cyanobacteria contain chlorophyll and convert carbon dioxide to sugar through carbon fixation. Unlike eukaryotic plants and algae, cyanobacteria are prokaryotic organisms.
Sometimes they're used as drugs. The classic example might be penicillin, a compound made by a fungus and used as the first widely-available antibiotic.
Answer:
Only some species may survive the event
Explanation:
Evolution is most likely to occur when catastrophic events alter community composition. Catastrophic global event can influence that only the hardiest, generalist species may survive. Specialists may be left without food and starve.
<span>The theory of special creation proposed that species are independently created and immutable over time. Darwin observed that species are related and change over time.</span>
