Peptide hormones employ ________ that amplify the response of the cell.

Fill in the blank(s) with the appropriate word(s).


second messengers

Peptide hormones employ second messengers that amplify the response of the cell.

Biology & Microbiology

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Evidence shows that the earliest life may have existed how long ago?

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Which of the following does NOT represent a sustainable approach to development?

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Recently, the bones (not fossils) of a possible new species of humans (in the genus Homo) have been found on an island in Indonesia (an island nation southeast of Asia). Using radiometric dating, scientists can show that these people were alive as

recently as 17,000 years ago. According to the information in this chapter, why do you think they probably used tools? What will be an ideal response?

Biology & Microbiology