The right answer for the question that is being asked and shown above is that: "<span>The reefs are an essential part of the ocean’s ecosystem, and when people build structures on top of them, they are easily damaged because they are so fragile."</span>
Answer:
<u><em>DNA is made of repeating units called nucleotides.</em></u>
Explanation:
DNA can be described as a double helix molecule made up of long polymer chains of nucleotides. The nucleotides which are present in a DNA are:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T)
The hydrogen bonds which occur in the pairing of nucleotides makes the double helix structure of DNA.
Adenine forms hydrogen bonds with Thymine.
Guanine forms hydrogen bonds with Cytosine.
The backbone of the DNA is made up of sugars and phosphates
Water is always cycling around, through and above the Earth in a natural water cycle that has existed for billions of years. As water moves between the land, ocean, rivers and atmosphere it changes from solid to liquid to gas. This natural water cycle is our planet’s way of recycling water, and is essential for life on Earth.
What Will Clean a Penny Faster, Water or Vinegar
Take note that the total distance that needs to be traveled is 360 miles. The train is moving at 60mph and 2.5 hours have passed. To get the remaining distance, first you need to solve for the distance traveled already.
Distance is equal to the velocity times the time travelling or:

So considering the given we can get the distance traveled in 2.5 hours.



So far, Ainsley traveled 150 miles. If her town is 360 miles away, you can get the remaining by subtracting the distance already traveled from the total distance.
360 miles - 150 miles = 210 miles.
Now if you want to put that into a single equation you can do that by combining all the equations together.
d = 360 miles - (vt).d = 360 miles - (60mph)(2.5 h)
d = 360 miles - 150 miles
d = 210 miles