Consider the genetic cross for sex in humans. xx is female and xy is male. a family has 4 children, all girls. what are the chances that the family will have a boy as their fifth child? a) 0% b) 25% c) 50% d) 100% 3)

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.

Which measure of an earthquake depends on how close you are to the focus?