In a cladogram -
A. the most ancient organisms, called the origin, are found at the very base of the tree diagram
B. the closer the branch point is to an organism, the more distantly related those organisms are
C. neither A nor B is true
D. both A and B are true

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

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.