•explain why viruses are such effective parasites

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What enzyme is most important for dna replication and why?

Explain how light energy is turned into chemical energy? ! due tomorrow!