In 1859, Charles Darwin wrote, "The affinities of all the beings of the same class have sometimes been represented by a great tree... As buds give rise by growth to fresh buds, and these if vigorous, branch out and overtop on all sides many a feebler branch, so by generation I believe it has been with the great Tree of Life, which fills with its dead and broken branches the crust of the earth, and covers the surface with its ever branching and beautiful ramifications." At the base of the evolutionary tree of all life is ___________.
A. the first tetrapod
B. an amniote
C. an organism that is a common ancestor to all living organisms.
D. a fork that represents the split between plants and animals.
C. an organism that is a common ancestor to all living organisms.
You might also like to view...
Cyanide affects the electron transport system of mitochondria by binding to components of the system and inhibiting the transfer of electrons to oxygen. If seeds were treated with cyanide, what results would they show in the tetrazolium test? Explain.
What will be an ideal response?
Both the phosphorylation of intermediates and the formation of ATP in glycolysis are examples of
A) substrate-level phosphorylation. B) product-level phosphorylation. C) oxidative phosphorylation. D) anabolic phosphorylation. E) aerobic phosphorylation.
For eukaryotic organisms, polyploidy is always a lethal condition
Indicate whether the statement is true or false
One of the complications of Alzheimer's disease is an interference with learning and memory. This disease would most likely involve _____
A) changes in the concentration of ions in the extracellular fluid surrounding neurons B) changes in myelination of axons C) molecular and structural changes at synapses D) structural changes to ion channels in axons