It was critical.. As you know cells are microscopic and cannot be seen with the naked eye. Without a microscope it probably wouldn't have been discovered.
Hey there!
Let's start with the first blank. The ozone layer starts in the stratosphere and is made of ozone gases made to protect the Earth from the Sun's harmful UV rays. If the ozone layer wasn't there (not to mention the rest of the atmosphere), we would be exposed to that kind of radiation. Thereofe, "Ultra violet rys would not be <u>blocked</u> by the ozone layer."
For the next one, a lot of levels of substances in the air would change, like UV and oxygen- as there would be more radiation from the lack of protection and all the oxygen would escape.
Hopefully this helps!
Answer:
Rift valleys and Mid-oceanic ridges are created from diverging plates.
Hope this helps :)
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Answer:
You could have created a mutation in the DNA strand that changed the color or you didn't copy the DNA verbatim.
Explanation:
