All of the following are found in both plant and animal cells, except a
a cell wall.
b
a plasma membrane.
c
mitochondria.
d
the endoplasmic reticulum.

What is the problem in this article? what solution does the article propose?

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area