I. HSO4- ; SO3 II. NaCℓO3 ; ZnCℓ2 III. CaO ; H2O2 Three pairs of species are given. The pair(s) in which the underlined element has the same oxidation state in both species is/are Blank. (Use numbers I, II, III in filling the blank)

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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