Which best describes binary fission--one way bacteria can reproduce?
a. an exchange of genetic material between two bacterial cells through a special pilus
b. a bacterium dividing in half
c. a female bacterium mates with a male bacterium
d. a female bacterium gamete joins a male bacterium gamete to produce a zygote?

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

burning fossil fouls really decrease the carbon in the atmosphere so b