How does tRNA determine the correct sequence in which to assemble the amino acids?

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

9. the history of life on earth is recorded in

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?