A chemical plant dumping toxic waste into a river would be an example of... a. erosion

b. non-point source pollution

c. point source pollution

help!!​

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

genetic variations are caused by mutations which are random in the population