What evidence BEST supports the presence of atmospheric oxygen 2.7 billion years ago? a. carbon 14 in plants
b. fossils found in stomatolites
c. layered iron rust in rocks

How do antiviral drugs work? in your own words.

Whay is the following best defines climate

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells