Multiple choice questions XXVI — task. Science CBSE, Class 9.

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1. Identify the names of two solitary coelenterates found in marine environments.

Jellyfish and sea anemone
Hydra and crinoids
Sea cucumbers, brittle stars
Sea urchins and sand dollars

2. What is the name of the group of animals that first developed the nervous system?

Mollusca
Arthropoda
Coelenterates
Nematoda

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