Following possess bilateral symmetry as larva and radial symmetry as adult:
Correct answer: C. Echinodermata
- A. Chordata
- B. Hydra
- C. Echinodermata
- D. Hemichordata
Explanation
Echinoderms have bilaterally symmetrical larvae but develop radial, usually pentaradial, symmetry as adults. Students may choose Hydra because it is radially symmetrical, but Hydra remains radial and does not show the bilateral-larva to radial-adult transition.
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About Concept of Evolution
Evolution is the heritable change in populations over generations, driven by mutation, recombination, natural selection, genetic drift and reproductive isolation. Questions examine variation, adaptation, survival and reproduction, speciation, fossil and anatomical evidence, and the difference between individual acclimatization and evolutionary change in a population.
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