Which of the following is not a potential sign of chemical change?
a. release of gas
c. change of color
b. evaporation of water
d. production of gas

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Which substance has non polar covalent bonds

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.