Is it possible to answer the questions in the photo

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse