The type of cells in glands that secrete hormones and other substances are

What is a traditional chinese touch therapy involving finger pressure applied to specific areas of the body to restore the flow of qi.

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

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?