Ecologist mark is trying to identify the type of pollution that caused excessive algae growth on a river and killed fishes and plants. which type of pollution
caused this situation?
a. thermal pollution
b. light pollution
c. nutrient pollution
d. noise pollution

What type of cell is produced after fertilization occurs and the gametes combines ?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Explain how the political influence of african americans leaders became weaker.