Which is a possible result of red tides?

Question

Algae feed off of nutrients from the colder layers of ocean waters.

Warmer water temperatures encourage the algae to grow.

Algae produce toxins that pass from one organism to another.

Nitrogen and phosphorus enter lakes and ponds from runoffs.

Answer 1

All of the above are possible results of red tides.

Answer 2

If sources of nutrients that cause eutrophication are reduced or eliminated, then _____.

algal blooms form in lakes and rivers

bacteria use up the oxygen in the water

eutrophication slows to its natural rate

algae produce toxins that are eaten by fish

Answer 3

If sources of nutrients that cause eutrophication are reduced or eliminated, then eutrophication slows to its natural rate.

Answer 4

The most common cause of algal blooms is _____ in the water.

an increase in nutrients

a decrease in temperature

a decrease in oxygen

Answer 5

The most common cause of algal blooms is an increase in nutrients in the water.