What is the word in bold? According to the biologist's observations the bacteria that were resistant to the chemical reproduced more quickly than the control group. a singular possessive noun a plural possessive noun

## Step 1<br />The problem asks us to identify the type of the word in bold, which is "biologist's". In English grammar, possessive nouns are used to indicate ownership or association. <br /><br />## Step 2<br />There are two types of possessive nouns: singular and plural. Singular possessive nouns indicate ownership of something by one person or thing. They are formed by adding an apostrophe and an '' to the end of the word. For example, "biologist's" is a singular possessive noun because it indicates that the biologist owns or is associated with something.<br /><br />## Step 3<br />On the other hand, plural possessive nouns indicate ownership of something by more than one person or thing. They are formed by adding an apostrophe after the '' at the end of the word. For example, "biologists'" is a plural possessive noun because it indicates that multiple biologists own or are associated with something.<br /><br />## Step 4<br />In the given sentence, "biologist's" is used to indicate that the biologist is associated with the observations. Therefore, it is a singular possessive noun.