First slide

Classification of Animals

Question

Which of the following organisms lacks cnidoblasts?

Easy

A

Ctenoplana
B

Gorgonia
C

Physalia
D

Pennatula

Solution

Ctenophores (e.g., Ctenoplana) lack cnidoblasts. They possess colloblasts (lasso cells or glue cells).
Gorgonia, Physalia and Pennatula belong to the phylum Cnidaria and have cnidoblasts.

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