Write a short letter to a friend (imaginary) who you are concerned may be using drugs. You can pick any drug of concern. Outline the evidence that you have observed and what you know about this drug from research/class. Include what you see has changed in their behavior and/or appearance. Include you suggestion regarding what steps should be taken to help this friend. Don't forget to add references to the bottom of your letter for me to review regarding any statistics you report in your submission.

Match the types of competition to their descriptions.

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

When analyzing tree rings, what do scientists assume a thin ring indicates?