What caused the stickleback population to have less armor and become faster?

In 1870, which path would settlers moving west from el paso to los angeles have followed? a) old spanish trail b) gila trail c) california trail d) oregon trail

Because north america is in a it has a variety of biomes and climates. a. high latitude zone c. middle latitude zone b. middle longitude zone d. high longitude zone select the best answer from the choices provided a b c d

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal