Apaleontologist is trying to study the dna of a fossil from an extinct animal called x. he has formulated three hypotheses. which hypothesis cannot be tested?
a. x's dna has a high proportion of protein.
b. the protein content of x's dna changes with its life cycle.
c. x's dna consists of a single strand.

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