Of the following, which is the most specific classification category? a) class b) genus c) order d) phylum

B. Genus

Explanation:

Genus and species are the most specific classification categories as they represent the particular genus and respective species. Other categories such as class, phylum and order give broader classification.

Example: Phylum Anthophyta includes all the vascular plants that bear flower and reproduce by seeds.  

However, genus "mangifera" represents all species of mango only.

B) Genus

The order from the broadest to most specific is

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.