Which of these is a significant effect of vascular plants?

they were the first plants to colonize land.

they gave rise to mosses.

they maintain ecological balance by preventing desertification.

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.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the