Introduced invasive species like the Asian citrus psyllid is dangerous because a. it has no natural predators
b. it drives native species to extinction
c. it reproduces quickly
d. all of the above​

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

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.

This is a biological reaction due to a stimulus. i need this quickly !