Describe signaling mechanisms among single celled organisms and describe the evolutionary significance

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear

Crystallization from cooling magma disvribe one way that a atoms bond b protons attract electronsc ions combine d minerals form

Bones function as levers for the muscles to provide movement of the body. what refers to increasing the angle of the joint, thus moving two bones farther apart? a) abduction b) adduction c) extension d) flexion