A unique species of snail has been discovered in the Negev Desert. At night, these snails use a toothlike rasping organ in their head to scrape up porous limestone; they then digest the algae that lived in the rock pores. This scraping organ is the

A. mantle.
B. labial palp.
C. crop.
D. tentacle.
E. radula.


Answer: E

Biology & Microbiology

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