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Umnica [9.8K]
3 years ago
11

What two substances are we concerned about over-nourishing our water sources and ultimately leading to eutrophication?

Biology
1 answer:
expeople1 [14]3 years ago
8 0

The correct answer is - nitrogen and phosphorus.

The nitrogen and the phosphorus are the two substances that cause most of the eutrophication. It is good for the organisms that live in the water when these two substances are available as they are very important nutrients, but if the optimal amount is surpassed than it can be devastating. When there's high quantities of nitrogen and phosphorus in the water it makes it much more rich in nutrients that it should be. That kind of situation is the best for the algae, which start growing all over the place, quickly covering the water and becoming the dominant life form. As that happens, the organisms that use photosynthesis will die out because the Sun will be blocked, and the algae  will also contribute to a big reduction of the oxygen in the water too. The end result being totally destroyed ecosystem that has been overtaken by algae.

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Anika [276]

A solid minute object that is said to come together for the formation of the planet and are believed to produce cosmic dust are called planetesimal.

The options that best describes the planetesimals are:

  • Option A. They are the origins of planets.

  • Option B. They formed from gas and dust.

  • Option D. They are believed to have developed in debris disks.

The descriptions can be explained as:

  • It is believed that planets formation occurred through planetesimals. The formation happened from gas, dust particles and debris.

  • By the process of accretion, the discs coalesced and became bigger and solid over time. This bigger mass started attracting other matters towards each other because of gravitational force.

  • This pull resulted in either breaking or creation a bigger mass of pieces known as planetesimals. The collision continued to become bigger and solid planets we know today.

Therefore, options A, B and D are correct.

To learn more about planetesimals refer to the link:

brainly.com/question/10337322

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2 years ago
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morpeh [17]
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The answer is option B "declining number and variety of the species in an area." Biodiversity is a variety of life for example a ecosystem has many species which makes it a biodiversity. Now a loss of a biodiversity would be loosing a huge amount of species in that area or ecosystem which would mean the answer is option B.

Hope this helps.

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Explanation:

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