All the animals of the grade radiata are____________?
Correct answer: A. Diploblastic
- A. Diploblastic
- B. Triploblastic
- C. Both
- D. Unicellular
Explanation
Radiate animals such as cnidarians develop from two primary germ layers, ectoderm and endoderm, so they are diploblastic. Students may choose c because some organisms show unusual developmental features, but the standard radiata group is classified as diploblastic.
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