Can someone check my answers for biology please?

Question

anonymous · Answer

1.   To be useful, a scientific name has to refer to  
all living species.**
all living and extinct species.
all species in one habitat.
a single species.
2.   Several different classes make up a 
kingdom.
phylum.
family.**
genus.
3.   Which are the two highest-level taxa in the Linnaean system?  
kingdom and order
domain and phylum
phylum and kingdom**
genus and kingdom
4.   Animals that are warm-blooded, have body hair, and produce milk for their young are grouped in the class  
Amphibia.**
Mammalia.
Aves.
Reptilia.
5.   The only "natural" taxa in Linnaeus's system is the  
phylum.
kingdom.
genus.
species.**