Which organisms are considered most primitive based upon the structure of their limbs?
a. bats
b. reptiles
c. porpoises
d. penguins
e. birds
ANSWER: b
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You measure the amount of enzyme activity in the presence of compound X and note that as you add more substrate the amount of enzyme activity increases. This indicates that the compound X is an __________.
A. non-competitive inhibitor B. competitive inhibitor C. activator D. allosteric inhibitor E. enzyme
DNA evidence has strongly supported the original groupings proposed by Carl Linnaeus to show relationships between organisms
Indicate whether the statement is true or false
A species found only within a certain region is said to be _______________ to that region.
Fill in the blank(s) with the appropriate word(s).
The figure below shows five water molecules. The hydrogen bonds shown in this figure are each between
A) two hydrogen atoms.
B) an oxygen and a hydrogen atom of the same water molecule.
C) an oxygen and a hydrogen atom of different water molecules.
D) two atoms with the same charge.