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likoan [24]
3 years ago
7

What forms the structure called a coral reef?

Biology
2 answers:
Sati [7]3 years ago
8 0
A because when the little fish die they sink to the bottom, and after time the skeletons build up on top of each other. 
bearhunter [10]3 years ago
3 0

Answer: a. skeletons of coral animals

A coral reef is a deep underwater ecosystem exhibiting walls or reefs build by corals. These reefs are formed by the colonies of organisms called as polyps, which are held together by calcium carbonate. The coral reefs are build in order to form stony corals, because of clustering of the polyps. The hard skeletonized structure provide protection to the polyps. These also provide shelter to small marine organisms like fishes.  






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Which of the following accurately identifies the chemical basis of Chargaff's rule?
sergiy2304 [10]

Answer:

The chemical basis of Chargaff"s rule is the bonding properties of  the DNA bases.

Explanation:

According to the Chargaff"s rule in a DNA molecule the total number of purine bases are equal with the total number of pyrimidine bases  that means

   Adenine +Guanine=Thymine +Cytosine

In simple words the rule is based on the 1:1 ratio of both purine and pyrimidine bases.

6 0
3 years ago
A drug made from chemistry is called a<br><br> PLZ HELP QUICK 100 POINTS
mrs_skeptik [129]

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8 0
3 years ago
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4. How does an increase in orbital radius affect average orbital speed
allsm [11]
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The orbital radius and the orbital speed is directly proportional. When the radius is increased, the orbital speed will also increase but it has to add energy to the system to increase the orbital radius. 
5 0
2 years ago
How do electrons gain energy in photosystem 1?
expeople1 [14]

Answer: they absorb photons from sunlight.

Explanation:

3 0
2 years ago
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What is the force of an object that needs a force 4500N to accelerate it at a rate of 5 m/s
babunello [35]

Answer:

The question is somehow not correct, it suppose to be what is the MASS of an object that needs a force 4500N to accelerate it at a rate of 5 m/s as gotten from another website.

The correct answer is 900kg.

Explanation:

To get the mass of the object use the formula

F=Ma

Where F is force

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a is acceleration.

F= 4500, M=? a=5m/s

4500= M× 5

M=4500/5

M=900kg

Mass is in kg

8 0
2 years ago
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