Why does the lithosphere sink back into the earth at trenches, which form the surface trace of subduction zones? A.
lithosphere is always lighter than the asthenosphere

B, the mantle is filled with gas

C. as the lithosphere moves away from the heat of the rift valley, it gets older and loses heat, ultimately giving it a higher density than the portion of the mantle which composes the asthenosphere

D. Because warm lithosphere has a higher density than the portion of the mantle which composes the asthenosphere.

Si el equipo no fuera bueno no con el entrenador.

What is the ecological role of food chains and food webs

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).