Corals are cnidaria which makes coral reef which is of calcium carbonate and act as eco system in deep marine water !
so the most appropriate answer is C !
He should show protons (and neutrons) in the nucleus of the atom.
Is the one used in textbook today
<span>köppen system of climatic classification is most used classification. Climate is the characteristic condition of the atmosphere near the earth surface at a certain place on earth. Most of classification today are based on this classification. Koppen divided the earth into climatic regions that coincided with world pattern of vegetation and soils. These recognize the five major climate types based on the annual precipitate and average temperature.</span>
Answer;
The above statement is false.
Explanation;
The correct statement would have been;
The half life of an element of an element is the amount of time is it takes for half of radioactive isotope to decay.
-Isotopes are atoms of the same element that have the same atomic number but different mass number. Radioactive decay happens when an unstable atomic nucleus of an isotope spontaneously changes to a lower-energy state and spits out a bit of radiation.
-Half life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate or undergo radioactive decay.
RNA and DNA are both types of nucleus acids. In their names long names, they both have the words “nucleic acid” in them. Nucleic acids are composed of carbon, hydrogen, oxygen, nitrogen, and phosphorus.
