Mutations that occur in skin or lung cells have little effect on the evolution of a species because mutations in these cells 1
usually lead to the death of the organism
2
cannot be passed on to offspring
3
are usually beneficial to the organism
4
lead to more serious mutations in offspring

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

Interferons play a vital role in the immune system why are interferons so important?

Which of these is evidence of global warming? a. overall rising seal levels b. falling global temperatures c. an increase in the size of glaciers d. stable precipitation patterns appex