Abad thesis will often contain all of the following, except
a. it makes no claims
b. it restates conventional wisdom.
c. it presents a claim readers might disagree with.
d. it offers personal opinions as the basis.

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

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