Cephalization describes the process by which organisms develop a distinct head. The head of a cephalized organism contains a concentrated group of nerves, or brain, that controls the rest of the organism, as well as specialized organs for consumption and perception, like mouths, eyes and ears. Cephalized organisms exhibit a distinct division between parts of the body; they have a front, back, top and bottom. These animals comprise the bulk of animals that are encountered on a daily basis.
sea star following organisms exhibits cephalization
According to theories concerning the origin of life, the atom is likely choice for the basic element of all living things because it :
B. Is relatively stable and can form four covalent bonds
This bonds will signify stability.
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Answer:
the mouth and the oesophagus
The empirical and molecular formulas for a compound related in a way that, A molecular formula is sometimes a multiple of the empirical formula.
<u>Explanation:</u>
The measure of the number of atoms of each element that are present in a compound is the Molecular formula. The empirical formula gives the ratio of elements that are present in a compound in reduced way. It the molecular formula of a particular compound is not in a state of being reduced further then, the empirical and the molecular formula appears to be same.
The chemical can be attained from the empirical formula of any compound. This can be achieved by knowing the molecular weight of any compound. The chemical formula for a compound obtained by composition analysis is always the empirical formula. Thus, the molecular formula is integer multiples of the subscripts of the empirical formula.
