A particular guitar string is supposed to vibrate at 200 Hz, but it is measured to

Myers' Psychology for AP 2
Dr. Tabor wanted to investigate the relationship between sleep and levels of alertness during a class for American university students. She gave surveys to 150 college freshmen in her introduction to psychology course, asking them to report how many hours they slept each night during a two-week perio

Myers' Psychology for AP 2
Why do researchers find the study of fraternal twins important? a. They share similar environments and the same genetic code. b. Data collected concerning their similarities is necessary for calculating heritability. c. They are the same age and are usually raised in similar environments, but they do

Concepts of Biology 1
What is the main difference between dispersal and vicariance? a. One leads to allopatric speciation, whereas the other leads to sympatric speciation. b. One involves the movement of the organism, whereas the other involves a change in the environment. c. One depends on a genetic mutation occurring, w

Psychology 1
Compare and contrast classical and operant conditioning. How are they alike? How do they differ?

Biochemistry 9
Give an example of substrate-level phosphorylation in a pathway other than the citric acid cycle.

Principles of Economics 9
Which of the following is an example of a positive externality? a. Dev mows Myras lawn and is paid $100 for the service. b. Devs lawnmower emits smoke that Myras neighbor Xavier has to breathe. c. Myras newly cut lawn makes her neighborhood more attractive. d. Myras neighbor Xavier offers to pay her

Chemistry for today : general, organic, and biochemistry 9
In the kinetic molecular theory of gases, which of the following statements concerning average speeds is true? a. Most of the molecules are moving at the average speed. b. Any given molecule moves at the average speed most of the time. c. When the temperature increases, more of the molecules will mov