On the island of saba in the caribbean, there are land crabs that live in the forests and come out at night to forage for food (this is true, they are big and also very cool.) in one particular park, there is a population of 60 land crabs. 40 of them are blue and the other 20 are red. this trait is controlled by alleles at a single locus. which of the following statements about this population of crabs is true?
a. blue crabs can either be homozygous dominant or heterozygotes.
b. the red crabs exhibit the recessive phenotype.
c. shell color in this population can evolve.
d. all of these statements are true.

How do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.