Secretions of and increase during puberty, leading to tremendous gains in body size and to attainment of skeletal maturity.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.