Excessive nutrients in the chesapeake bay foster the growth of algae, which robs the aquatic life of sunlight and oxygen. the main reason for the overabundance of nutrients is an increase in
a) fishing.
b) climate change.
c) the temperature.
d) human population.

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

How does the study of genetic disorders such as pku biologists understand normal alleles?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?