To be useful, a scientific name has to refer to (1 point)all living species.

all living and extinct species.

all species in one habitat.

a single species.

1. Several different classes make up a (1 point)kingdom.
   

phylum.

family.

genus.

1. Which are the two highest-level taxa in the Linnaean system? (1 point)kingdom and order
   

domain and phylum

phylum and kingdom

genus and kingdom

1. Animals that are warm-blooded, have body hair, and produce milk for their young are grouped in the class (1 point)Amphibia.
   

Mammalia.

Aves.