13. What is formed by a group of cells and tissues that work together to carry out a specific function?
a. organelle
b. organ
c. organ system
d. organism

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Explanation:

I think the answer is c. organ system because it says group of cells which is an organ system.

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read the sentence below and answer the question that follows. one of the norms in the village was to meet at the town square on fridays for a community dinner and dance. the underlined word in the sentence above is best defined as a a. cultural element shared by all people around the world b. specific area in a town used for traditional community events c. religious custom accepted and practiced by all members of a village d. behavioral pattern that is regularly accepted by a group of people