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andrew11 [14]
3 years ago
6

Eutrophication is caused by___

Biology
2 answers:
Zinaida [17]3 years ago
4 0
A dense growth of plant life in a aquatic ecosystem which many animals living there die(due to lack of enough oxygen present in water) and the ecosystem gets completely disrupted.

Eutrophication excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life.
exis [7]3 years ago
3 0

Answer:

Eutrophication can be defined the process by which the there is a significant increase in the population of algal growth.

This increase in the algal growth is due to the increase in the phosphorous and nitrogen in the water bodies.

The phosphorous increases the growth of algae in the nearby water bodies and depletes the oxygen level in water bodies.

So, Eutrophication is caused by excess of fertilizer(phosphorous) in water.

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8 0
2 years ago
Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs. Increased irrigatio
dedylja [7]

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C. The songs will become more similar to each other.

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One population´s males exhibit a courtship song that slightly differs from the one of the other group. This difference has a genetic basis. But females hardly notice the difference. All of them prefer loud frogs to quieter frogs, independently of the population to which they belong.

So when the two populations get together, individuals get mixed. Females do not recognize males of their group, and during the breeding season, all females will mate the most with louder males of any of the population. So females from population A might mate with males from population B, and females from population B might mate with males from population A. So after mating season, there is also a genetic mixture between populations.

The new generations will carry elements of both genotypes. So males´ songs will be even more similar to each other. Songs will become more similar to each other because individuals of both populations are mixed and mated, and their genes intercrossed, producing new individuals with genes of both populations.

8 0
3 years ago
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