In a classic study by Rosenthal and Jacobson, teacher expectations were shown to affect students' IQ scores

Which of the following is a characteristic of both light waves and sound waves?

a) hue b) decibels c) amplitude d) wavelength

Without the presence of a chemical signal produced by a gene on the Y chromosome, the

gonads become a. dormant. b. undifferentiated. c. testes. d. reabsorbed. e. ovaries