Besides supporting and protecting a cell, the cell membrane regulates what enters and leaves the cell.
I am soo sorry this is 4 hours late!!! Hope this helps!!! :)
The four types of macromolecules in cells are nucleic acids, lipids, proteins, and carbohydrates.
Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
The answer is "none of the above".
The smooth muscle is responsible for movement of food by peristalsis and mechanical digestion by segmentation.
Answer:
Metamorphic rocks develop when heat and pressure convert an existing rock into a new rock. Contact metamorphism transpires when hot magma converts the rock that it contacts. Regional metamorphism remodels large areas of existing rocks under the enormous heat and pressure created by tectonic forces.
Explanation:
