Students placed some sand on one side of a tray and carefully poured water in the remaining portion of the tray. They gently rocked the tray side to side 10 times, to create waves. After this action, some of the sand has moved. Which of the following statements best describes what happened? A. The waves cause hurricanes to form

B. The action of the waves causes sand to pile up higher and higher on the beach

C. The sand has been chemically weathered

D. The waves have eroded the sand and then deposited some of it in the water

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Which statement best describes the role of religion and culture in ancient medicine?

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10