The sequences of dna that are cut out before transcription are known as

exons
codons
introns
promoters

Often, caries will develop in an area of the tooth that's not readily accessible. which cavity preparation form defines this? a. retention b. resistance c. outline d. convenience

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?