Which of the following is not a function in which the cell membrane participates?

a. regulating transport of materials in and out of the cell.
b. providing recognition between cells.
c. attaching to ribosomes
d. cells join to form tissues
e. provide communication between cells

When analyzing tree rings, what do scientists assume a thin ring indicates?

How does friction with the atmosphere affect the speed of an artificial satellite

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.