Older adults need more vitamin d than younger adults because they a. are less efficient at making their own. b. excrete large amounts in their urine. c. do not eat enough fat to absorb the vitamin efficiently. d. are in a state of positive calcium balance.

Amistake occurs during mitosis of a muscle stem cell.how might this affect muscle tissue

The  central dogma  of molecular biology is centered upon the process of protein synthesis, in which the information from dna is transcribed and translated, resulting in multiple amino acids being joined to form a)lipidsb)proteinsc)carbohydratesd)nucleic acids

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.