Gas exchange between the air and a cell in an insect tracheal system occurs at the ____
a. trachea
b. tracheal branches
c. gill filaments
d. tracheoles
e. spiracles
ANSWER: d
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What is the process that eventually leads to the death of a plant?
A. outcrossing B. dichogamy C. abscission D. perennial E. senescence
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a. Dionaea muscipula b. Atriplex spongiosa c. Lathyrusodoratus d. Phaseolus e. Quercus suber
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a. Chytrids b. Ascomycete c. Zygomycetes d. Glomeromycetes e. Basidiomycetyes