Phylogenetic systematics produce branching diagrams called:a
cladograms.
b. phenograms.
c. cladistic trees.
d. molecular clocks.
e. phylogenic trees
a
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Eukaryotic mRNAs are modified by addition of a poly(A) sequences at the 3' end and 7-methyl guanosine at the 5' end.
Answer the following statement true (T) or false (F)
Blood pH is kept near a value of 7.3 - 7.5 because of
a. salts. b. buffers. c. acids. d. bases. e. water.
Membrane proteins perform all of the following functions except
A) receptors. B) transporters. C) enzymes. D) blocks. E) anchors.
Van der Waals interactions may result when _____
A) hybrid orbitals overlap B) electrons are not symmetrically distributed in a molecule C) molecules held by ionic bonds react with water D) two polar covalent bonds react E) a hydrogen atom loses an electron