Which of the following statements does not apply to the k value in the equation for the oxygen binding curve of myoglobin? a) it is numerically equal to p50. b) it is defined as that oxygen partial pressure at which half of the oxygen binding sites are occupied. c) it is a measure of the affinity of myoglobin for oxygen. d) if y > k, then myoglobin is less than 50% saturated with oxygen. e) it is the value of po2 at which y = 0.5.

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.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.