Determine whether the following statements about sympatric speciation are true or false. a. Sympatric speciation only occurs in areas where there is local variation in environmental resources. b. A dam dividing a fish population could lead to sympatric speciation. c. Specialization on different plant hosts for members of an insect population can lead to sympatric speciation.

a. Sympatric speciation only occurs in areas where there is local variation in environmental resources.  --  False.

b. A dam dividing a fish population could lead to sympatric speciation.  -- False.

c. Specialization on different plant hosts for members of an insect population can lead to sympatric speciation. --  False.

d. Sexual selection may promote sympatric speciation is true.

Explanation:

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.