There are two main ways in which molecules are transported into and out of cells - active transport and passive transport. which of the following statements is true of passive transport? a. molecules move up a concentration gradient during passive transport. b. endocytosis and exocytosis are two forms of passive transport. c. carrier proteins are sometimes used during passive transport. d. energy, in the form of atp, is essential for passive transport.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

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.

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim