The animals that consume the producers for their metabolic requirements.

In skeletal muscle contraction, which of the following acts to allow the crossbridge cycle to occur

when it flows into the cytosol through open ion channels?

a. troponin b. Ca2+ c. tropomyosin d. ATP e. acetylcholine

In convergence, a single neuron is controlled by signals from two or more presynaptic neurons

____________________ Indicate whether the statement is true or false.

made of smooth muscle

What will be an ideal response?

What is the significance of the minerals present in hydrothermal vents in the surface metabolism model of chemical evolution?

A) The minerals provided kinetic energy for the formation of organic molecules. B) The minerals helped catalyze the formation of organic molecules. C) The minerals helped nonpolar molecules dissolve in water. D) The minerals became incorporated into functional groups.