Reptilian embryos are protected from desiccation by a leathery shell. Similarly, which pair of structures protects seed plants' embryos and male gametophytes, respectively, from desiccation?
A) ovules?waxy cuticle
B) ovaries?filaments
C) fruits?stamens
D) pollen grains?waxy cuticle
E) integuments?sporopollenin
Answer: E
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