Water and ammonia both have low vapor pressures compared to other substances like carbon dioxide or hydrogen gas because of a. london forces b. hydrogen bonding c. ion-dipole forces d. lattice structures

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi