Nuclear dna can be extracted from bones and teeth to determine personal identification. if, however, the nuclear dna is degraded or damaged, there is another substance which is more plentiful and durable that can be analyzed. what is the name of this substance?

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

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material

Which animal is a producer in this ecosystem