If the forest is left untouched, how will the forest change over time?

The forest will remain unchanged.
The forest will remain unchanged.

The forest will be repopulated by trees and eventually become a forest again.
The forest will be repopulated by trees and eventually become a forest again.

The area will erode and remain without life.
The area will erode and remain without life.

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

Isolated volcanic peaks on the ocean floor are