1. What did the experiments of Griffith and Avery show about genetic information? 2. How did the results of the Hershey-Chase experiment strengthen Avery's conclusions?
3. What are the three key roles of DNA?
4. Evaluate Reasoning How did Hershey and Chase use radioactivity to draw a conclusion
about proteins and DNA?
5. SEP Use Evidence to Construct an Argument in the 1940s, many scientists were
convinced that protein was the genetic material. Refute this claim using the experiments
in this lesson.

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is nm. if the same force moves the same cart three times that distance, the work done is nm.

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .

What type of tree is the tallest tree in the world?