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ZOO 101 ZOO 101 Past Questions Objective Question

Question

Metagenesis in Obelia signifies the
Options
A Alternation of generations between free swimming diploid medusoid and diploid polypoid stage
Correct Answer
B Alternation of generations between haploid gametogenetic medusa and polypoid stage
C Formation of medusa on gonangium
D Formation of polyp by budding
Correct Answer

Option A is the correct answer.

Detailed Explanation

Metagenesis in Obelia refers to the alternation of generations between the sessile, asexually reproducing polypoid colony (diploid) and the free-swimming, sexually reproducing medusoid stage (also diploid). This is a true alternation of generations where both stages are diploid, unlike the alternation of generations in plants.

Hint

This term describes the life cycle where a sessile polyp stage alternates with a free-swimming medusa stage.

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