How are kettle lakes formed? A. glacier movement scraping depressions in ground
B. from ice blocks calving off melting glaciers and digging holes
C. from weight of tons of glacier ice pressing down on ground
D. from sink holes forming from underground streams

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming