The classification scheme of Linnaeus was originally based on __________, but has now been altered
to reflect __________.
a. similarities; structural differences
b. biodiversity; structural similarity
c. evolutionary history; structural similarity
d. similarities; evolutionary history
e. differences; similarities
D
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Which cells relay messages from photoreceptor cells to non-photoreceptor cells?
a. optic ganglion cells b. amacrine cells c. bipolar cells d. rods and cones e. horizontal cells
Which of the following nucleotide bases are present in equal amounts in DNA
a) adenine and guanine b) adenine and cytosine c) thymine and cytosine d) adenine and thymine e) thymine and guanine
Why are there several structurally different pigments in the reaction centers of photosystems?
A) Excited electrons must pass through several pigments before they can be transferred to electron acceptors of the electron transport chain. B) This arrangement enables the plant to absorb light energy of a variety of wavelengths. C) They enable the plant to absorb more photons from light energy, all of which are at the same wavelength. D) They enable the reaction center to excite electrons to a higher energy level.
One way in which monocots and eudicots differ is in ____.
A. having the capacity to bear seeds B. their types of tissues C. their organ systems D. their pattern of tissue organization E. having vascular bundles