Direct Development vs Indirect Development.
evolutionary
Biological species concept, phenetic species concept, reproductive competition species concept, evolutionary species concept, and the recognition species concept.
Speciation is the evolutionary process by which new biological species arise.
gene similarities, physical structures, and fossil record.
Divergent Evolution Pvt Locklear was here ;)
Benthic snail larvae are more likely to become isolated and therefore speciate at a higher rate creating more lineages.
Evolutionary trends are either progressive or retrogressive. During progressive evolution new structures are created whereas in retrogressive evolution the existing structures are reduced or eliminated.
macroevolution .........novanet
The evolutionary history of a species is often displayed in a phylogenetic tree. This will clearly show the history of the species, which is also known as phylogeny.
Adaptation for stronger shells.
macroevolution .........novanet
The evolutionary history of a species is often displayed in a phylogenetic tree. This will clearly show the history of the species, which is also known as phylogeny.
Orthoselection :A primary selective pressure of a directional kind, which results in a self-perpetuating evolutionary trend. Species selection, via the effect hypothesis, has been advanced as an alternative explanation for such trends.
Cladograms tell you which animals are the closet in relationship, which are the farthest, what characteristics the animals have in common, what characteristics they would need to have in order to be closely related to them, and the number of shared characteristics between the animals.
what are the species to be included in the reconstruction of the evolutionary history of Polytoma and why?
Air-breathing animals do not return to breathing water.
Secular trends in new childhood epidemics, insights from evolutionary medicine.