Low blood glucose stimulates which organ(s) to release glucagon into the bloodstream? a. gallbladder b. liver c. pancreas d. spleen e. kidneys

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

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 an eon in the time scale? phanerozoic proterozoic archean all of the above