Which statement best describes the effect of the low density of frozen water in a lake? water in the lake freezes from the bottom up, killing all organisms. water removes thermal energy from surrounding land, causing the land to freeze. water freezing contracts the water and causes levels to decrease. water freezing on the top floats and provides insulation to the organisms living below.

What abo controlling alleles could kim give her child

Pl which diagram illustrates prophase?

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.