3. Which of the following researchers used radioac-

tive markers in experiments to show that DNA was

the genetic material in cells?

a. Frederick Griffith

b. Oswald Avery

C. Alfred Hershey and Martha Chase

d. James Watson and Francis Crick

F a wave has amplitude of 0.2 meters, a wavelength of 0.5 meters, and a frequency of 32 Hz, at what speed is it moving?

Evolution by natural selection is an example of scientific

What was unique about the mutations of obtusacanthus

An endangered species of fish has a population that is decreasing exponentially:A=A0 e^kt The population 10 years ago was 1700. Today, only 800 of the fish are alive. Once the population drops below 100, the situation will be irreversible.

Where are our traits located?

Which conclusion about the meaning of Y is correct if the allele combination Yy is for yellow seeds? a. yellow and dominant b. green and recessive c. yellow and recessive d. green and dominant

What is true about web based email? A. it can never be used in evidence B. it is downloaded to the hard drive of a computer C. it is sometimes a stored on the computer like other web pages D. none of the above

Crude oil is composed of: a. Fatty acids c. Metal oxides b. Hydrocarbons d. Halogens

What might introduction of exotic species disrupt an ecosystem

Will aluminum gain or lose electron and why?