The 1-m height attainable by Dawsonia moss is at the upper end of the size range reached by mosses. What accounts for the relative tallness of Dawsonia?
A) the cuticle that is found along the ridges of "leaves"
B) "leaves" that are more than one cell layer thick
C) reduced size, mass, and persistence of the sporophytes, which allows gametophores to grow taller
D) the presence of conducting tissues in the "stem"
D
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Which of the following is always a part of
speciation?
a. behavioral isolation b. temporal isolation c. reproductive isolation d. ecological isolation e. mechanical isolation
Aposematic, or warning coloration, serves to protect an animal or plant by signaling to potential ________ to stay away.
A. competitors B. predators C. mates D. rivals
In ______ diabetes, no insulin is provided.
Fill in the blank(s) with the appropriate word(s).
In the mosses, antheridia produce
A. eggs. B. zygotes. C. diploid cells. D. sperm.