Answer:
Ponds:
Shallow & warm
A lot of plant and animal life
Many nutrients
Lakes:
Large, deep, cold
Little sunlight near bottom
Plants mainly along the shore
Buccinators are muscles in the cheek that help smiling.
Laris oculi are muscles helping close eyelids.
Orbicularis oris is a muscle that helps manipulate the mouth:
the correct answer is D. all the above are muscles that help facial expression.
The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Ozone would be the secondary pollutant because it is caused when two primary pollutants react. Hope this helps!