From what feature are jaws thought to have evolved?
A. Pharynx
B. Vertebrae
C. Legs
D. Arms
E. Gill arches
Answer: E
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How many electrons are shared in a double covalent bond? a. Two pairs b. Four pairs c. One pair d. Electrons are not shared in covalent bonds
e. Three pairs
Four of the five choices listed below are examples of
directional selection. Select the exception. a. pesticide resistance b. sexual dimorphism c. wing color in peppered moths d. coat color in rock pocket mice e. antibiotic resistance
Which arthropod subgroup includes the spiders?
A) Arachnids B) Crustaceans C) Insects D) None of these
Which statement best describes the plot in the accompanying figure?
a. The figure represents an endergonic reaction.
b. The figure represents a spontaneous reaction.
c. The products have more free energy than the reactants.
d. The reactants have more free energy than the products.
e. The reaction is endergonic, and in addition, the products have more free energy than the reactants.