Jamal needs to know how fast a red oak sapling grows. what can he do to find this out?
a. grow a sapling from seed and measure its growth periodically.
b. ask his friends to find out if any of them have seen a sapling grow.
c. cut down an adult red oak and count its rings.

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

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.

In which state was more than 100 billion tons of coal mined in 2005?