The ozone layer O A. is a layer of water in the deep ocean
O B. helps keep Earth warm
C. Screens out much ultraviolet radiation
O D. is getting thicker
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Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Most of the carbon on earth is stored in the form of

Witch theory suggests all living things are made up of cell or cells