What do you mean by retrogressive metamorphosis? Give an illustrated account of the gonads, developmental sequences and metamorphosis in Herdmania. (UPSC 2014, 20 Marks, )

आप प्रतिगामी कायांतरण से क्या समझते हैं? गोनाड्स, विकासात्मक अनुक्रम और हर्डमैनिया में कायांतरण का चित्रित विवरण दें। (What do you mean by retrogressive metamorphosis? Give an illustrated account of the gonads, developmental sequences and metamorphosis in Herdmania.)

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What do you mean by retrogressive metamorphosis? Give an illustrated account of the gonads, developmental sequences and metamorphosis in Herdmania. (UPSC 2014, 20 Marks, )