Which one of these is not an example of intercellular communication?

a. nerve signal transmitted from brain to skin cell

b. pituitary hormone regulates body temperature

c. signaling molecule defused through plasmodesmatum of plant

d. energy production in mitochondria

me

What is the importantence of the carbon and nitretan cycles in the environment

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

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