What is a polypeptide chain? a. the beginning of a protein
b. the strand of mRNA
c. the strand of tRNA

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

Which of the following is not a potential result of deforestation?

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content