Fatima is doing an experiment to determine the specific heat of several different substances. The specific heat of a substance is the amount of heat energy required to increase 1 kg of the substance by 1°C. Which of the following data tables would be best for her to use to record the data from her experiment?

W.
X.

Y.
Z.
A.
Y
B.
X
C.
Z
D.
W

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.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Everything that surrounds a particular organism