Kepler's Second Law Describes the Way an Object's Speed Varies along Its Orbit
Answer:
B
Explanation:
About 54O mil years ago the Camberian Explosion happened and in Camberian period major animal phyla appear according to fossil records.
<span>The answer is selectively permeable. Indeed, plasma membrane is a cell membrane that permits the pass fo some molecules through it and impede the pass of others. This is an important property of the cell membranes for the metabolism and equilibrium of the chemical reactions that happens in the cells. </span>