Irene knows her blood type is B, but William does not know his blood type. However, William knows that his mother and father both had blood type A. Irene and William's first child is a boy with type O blood. Based on this information, William's blood type could be .
(Hint: Draw out the pedigree)
a. B only
b. either B or O
c. O only
d. either AB or O
e. A only

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.

All other things being equal the size of a population will decrease if