Why does the human body have so many different types of cells

Me 1. identify countries 2 and 3 shown above. a) australia and samoa b) samoa and vanutu c) micronesia and samoa d) new zealand and new guinea

The cause and events that led to civil rights

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?