What type of dna mutation is this? original strand: a-t-c-g-t-a-g-g-c-t-a-g mutated strand: a-t-c-g-a-t-a-g-g-c-t-a-g a.) nucleotide insertion b.) trinucleotide repeat c.) single nucleotide substitution (point mutation) d.) nucleotide deletion

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

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

The transport tubes for food coming down the plants are called?