Why are there no gram-positive archaea species, but there are gram-positive bacteria species?

Defend or refute the argument that the government has too large a presence in the agriculture industry.

What causes temperature extremes in the desert

Compare and contrast cladistics and phylogeny. what are their advantages and disadvantages? which is the most useful in understanding how an organism developed into its current form? which concept most strongly supports your opinion about the origin of any given organism?