4. Why would a DNA structure in which each base type could form hydrogen bonds with any of the other three base types
not produce a molecule that is easily replicated?

The influenza virus cause the flu, but not other diseases. why?

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.

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine