Which two words are paired correctly? vertebrate, endoskeleton
invertebrate, endoskeleton
vertebrate, autotroph
invertebrate, autotroph

Which term best describes a community in which people work mostly in factories? a. agricultural. b. hunting and gathering. c. domesticated. industrial.

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food