What role did gravity play in forming the sun?
gravity caused the solar nebula to collapse toward the center, causing the center of the sun to be dense and hot.
gravity turned the protoplanetary disk into a planetesimal, which became the sun.
gravity turned the protoplanetary disk into a rotating solar nebula, which became the sun.
gravity caused small particles to collide to form larger particles called planetesimals, which eventually formed the sun.

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

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.

Me the formula cacl2 represents the compound