Once dna was shown to be the primary genetic material of life, a race among scientists took place to work out its structure. which concept came from studying the amounts of each dna base in different organisms? a. codon-amino acid pairings b. double helix structure c. complementary base-pairing d. the relationship between dna and rna

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.