Which of these is the extant (that is, living) species most closely related to species X? c. V
Explanation:
These refers to the following evolutionary tree. The species that are <em>most closely related to species X, are species V because they shared a common ancestor with X most recently.</em> In the evolutionary tree whose horizontal axis represents time (present time is on the far right) and whose vertical axis represents morphological change,<em> </em>a single clade (i.e., a group of species that share a common ancestor) can exhibit both gradualism and punctuated equilibrium.
B: The gravitational pull of the Sun keeps the planets from leaving their orbits.
Explanation:
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
