Taxonomic categories which come lower to the rank of class are

The suffix $-phyta$ indicates

After which term and in what manner is the name of the author who described the species mentioned in biological nomenclature?

Identify the true statements from below $:-$
$(a)$ Convolvulaceae and Solanaceae belong to the same order
$(b)$ Animals,mammals,and dogs represent different taxa at same levels
$(c)$ Musca domestica is the scientific name of housefly
$(d)$ Taxonomic categories are distinct biological entities

Which one of the following animals is correctly matched with its particular named taxonomic category?

What are the names of two species of the genus $Homo$ and two birds of the family $Columbidae$?