Based on pollen morphology, it would appear that magnoliids are most closely related to ____
a. eudicots
b. star anise group
c. monocots
d. water lilies
e. gymnosperms
C
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Which one of the following most accurately describes the ratio of oxygen to carbon to hydrogen in a simple sugar such as glucose?
A. 1 : 2 : 1 B. 1 : 1 : 2 C. 2 : 1 : 1 D. 1 : 2 : 3 E. 1 : 3 : 2
In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and species richness. B. ecosystem function and genetic diversity. C. species diversity and genetic diversity. D. species diversity and ecosystem function.
The accompanying figure represents a sequence of events occurring in the neuronal membrane (designated by the numbers 1 and 2). The letter “I” indicates an ion. What event is mostly likely being portrayed in this figure?
a. activation of voltage-gated sodium channels
b. activation of voltage-gated potassium channels
c. activation of voltage-gated chloride channels
d. activation of sodium-chloride pumps
e. activation of sodium-potassium pumps
The comparison of embryos across species reveals the conservative nature of the genes responsible for ____.
A. food procurement B. reproductive behavior C. embryonic development D. embryonic size E. embryonic intelligence