The early atmosphere could not filter out the Sun’s most harmful rays, which lie at the violet end of the spectrum. how did this fact influence the appearance of the organisms that that thrived in the shallow waters?

What is hydroelectric power produced by?

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.