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Practice Listening: Multiple Choice, Single Answer ID: #38670 Medium Cockroaches
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Almost 30 species of cockroach are known. Among the known ones, the American cockroach is 30 millimeters long. The German and the Asian cockroach are 15 milime long. The tropical cockroaches are bigger, and the Oriental cockroach is about 25 milimeters. Carboniferous and Permian are extinct species. They were so big that they were called pests instead of insects. Female cockroaches carry egg cases on the end of their abdomen. German female cockroaches can carry up to 30 to 40 long, thin eggs. The nymphs, or the baby cockroaches are of white colour at birth, but within three to four hours their outer shell hardens and darkens. This process is called malting. A female produces about eight such egg cases in a lifetime of almost one year, so each cockroach can produce almost 300 to 400 offspring.

Which of the following is the smallest species of present day cockroaches?

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