Most eukaryotic genes contain noncoding sequences called that are interspersed with the coding sequences.
a. introns b. exons c. codons d. spacers e. spliceosomes

Match each organ or function with its body system. produces urine large intestine ureters mouth filters blood absorbs nutrients from food

Plants that have reproductive structures called cones are?

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.