Echinoderms are animals that are ______?
ایکینوڈرمز جانور ہیں جو ______ ہیں؟
- Invertebrates
- Vertebrates
- Mammals
- None of the above
Explanation
Echinoderms (such as starfish, sea urchins, and sea cucumbers) are invertebrates because they lack a backbone.
They have a unique water vascular system and radial symmetry.
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قدیم تہذیبوں اور معاشروں کا مطالعہ کیا کہلاتا ہے؟
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- None of these
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