6. Into a bottle a lab tech put bacteria, sugar, oxygen, and protein. The bottle was then sealed so that it was a closed system. A closed system means nothing could get in or out. The bacteria began to multiply and increase in number. Did the bottles’ mass increase, decrease, or stay the same? In your answer, you must give reasons (2) and use the Law of Conservations of Mass and Energy. (Minimum of 4 sentences).

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

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gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.