Classification is a tool that is used to study living and extinct organisms. which of the following are levels in this system?
a. living and nonliving
b. families, genera, and species
c. endangered and not endangered
d. land, marine, and freshwater organisms

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

Wich organism obtains its energy from dead or decaying matter