Which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide to diffuse into and out of the cell? * the cell membrane contains proteins molecules. the cell membrane contains cholesterol molecules. the cell membrane is made up of two layers of phospholipids. the cell membrane is anchored to the cytoplasm by the cytoskeleton.

This is the main structural axis of the plant that supports leaves, flowers and fruits; transports fluids; stores nutrients and produces new tissue.

Examine the air pressure map. which type of line is shown on the map?

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.