a basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell
a
is structurally more complex.
b
is considerably larger.
c
possesses membrane-bound organelles.
d
lacks a nucleus.
e
lacks dna.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

answer; polycythemia is the correct answer;

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b