Muscle twitching can be explained by the action of synapse. A. Cell signaling
B. temporal summation
C. spatial summation
D. all for nothing response

Which direction does the energy flow in this energy pyramid ?

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry

Which force diagram accurately represents a satellite in orbit around earth? image for option 1 image for option 2 image for option 3 image for option 4