The changing appearance of the Moon during the lunar cycle is a result of changes in - a the amount of light the Moon emits. b the shadows Earth casts on the Moon. c the amount of sunlight that hits the Moon’s surface. d relative positions of Earth, the Moon and the Sun.

!if we removed the wolf, snake, and hawk from this food web, what best explains the impact it would have? a) the number of producers would increase. b)the number of decomposers would increase. c)the number of primary consumers would increase. d)the numbers of primary consumers would decrease.

Study this image which statement best describes the rock shown check all that apply

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.