Shampoos and hair often claim to have nutrients and vitamins your hair must have to grow and be healthy. a. what is the composition of the hair shaft onto which shampoos and conditioners are applied? b. taking into account the composition of the hair shafts, do you think these vitamins and nutrients will be beneficial? why or why not ?

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

Can you identify which of the following groups of organisms are, or are not, populations? a. the american bison (bison bison) and grey wolves (canis lupus) currently living in yellowstone national parkb. all of the rainbow trout (oncorhynchus mykiss that) that have ever lived in lake eriec. the group of american bison (bison bison) currently living in yellowstone national parkd. a group of calliope hummingbirds (selasphorus calliope) and a group of rufous hummingbirds (selasphorus rufus) living in the same new hampshire woodse. the northern cardinals (cardinalis cardinalis) living on opposite shores of lake champlain f. all of the whales currently living in the atlantic ocean off cape cod, massachusetts

Models are non-visual ways of coummincating how someone thinks about something in the natural world