Select all the correct answers. .
Which three statements provide reasons that scientists are considering renewable sources of energy?
re...
Most renewable resources are clean and nonpolluting.
Renewable resources can be replenished.

O Renewable sources are conventional resources.
Most renewable resources are easily available in nature.
All renewable resources are cost effective.
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Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

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.

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area