Many people take vitamin supplements to promote health and the potential for overdose depends on whether a particular vitamin is fat soluble or water soluble. If a vitamin is soluble in nonpolar fatty tissues it will accumulate in the body, whereas water-soluble vitamins are readily excreted. Use the ball-and-stick models of niacin and vitamin D to determine which is more fat soluble.

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?