Which of the following plants belongs to the order Rosales?

What is the genus of the sunflower?

Which of the following $statement(s)$ is/are not correct?
$(i)$ Genus comprises a group of related species which has more characters in common in comparison to species of other genera.
$(ii)$ Three different genera such as $Solanum$,$Datura$ and $Petunia$ are placed in the family $Malvaceae$.
$(iii)$ In case of plants,classes with a few similar characters are assigned to a higher category called phylum.

As we go higher from species to kingdom in the taxonomic hierarchy,the number of common characteristics shared by the organisms:

Studies under karyotaxonomy are based upon

What is classification?