Topic content:
Among the hierarchical units of biological classification, the highest and lowest are
A. Gate and boundary
B. Division
C. Class and species
D. Realm and species
Best answer:
D
Answer analysis:
There is no explanation for this question
Test core:
Biological classification units: the main biological classification units are kingdom, phylum, class, order, family, genus and species. There are also subspecies (abbreviated as subsp.), plants and varieties (abbreviated as var.). Sometimes there are some auxiliary grades. In fact, the main classification grade terms are prefixed with super - and sub -. Sometimes, infraclass and infraorder are set respectively under subclass and suborder. Example: Taking the well-known name Felisdomesticus (domestic cat) as an example, its classification system and name are as follows: Animalia, Chordata, Vertebrata, Vertebrata, Mammalia, Mammalia, Carnivora, Felidae, Felis