The dark areas on the map show the distribution of coral reefs around the world. What explanation best describes why the distribution of coral reefs is limited to the areas shown on the map? A. Competition for space is lowest in waters along the equator.
B. Equatorial waters provide some of the clearest water for symbiotic algae to produce energy.
C. Predation is lowest in areas along the equator because of increased rates of decomposition.
D. The corals need the strong water currents found here in order to find sufficient mates.

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

the tricuspid valve is present between right atrium and right ventricle

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.