What is smooth muscle tone? a. can rapidly develop action potentials b. shallow invaginations of cell membrane c. relatively constant tension maintained for a period of time d. intracellular cytoskeleton e. enzyme that removes phosphate from myosin?

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism