What effect do keystone species have on an ecosystem

What happened to rosalind franklin in 1956?

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

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?