In the Galapagos Island finches, the variation in the beak shape corresponded to which finch characteristic?

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

What type of plant is good for a bioassay and where can i buy it? i only have a month.

What is the next step in muscle contraction after the actin changes shape