The cladogram divides plants into two main groups: nonvascular on the left and vascular on the right. The right branch is further divided. What fossil evidence would BEST SUPPORT this division and classification of plants into the divisions of flowering and non-flowering?
A) petrified wood
Eliminate
B) compacted peat
C) leaf impressions
D) seeds preserved in amber

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

What element does susan b. anthony include in this passage to strengthen her argument?