Answer:
B
Perception - which is the ability to receive and interpret information that reached the ears through their sensory receptors and must be translated from the sound waves into the neural signals for the brain.
Answer:
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tissues
decreased ability to survive changing conditions
Hope this helps
The answer is Echinoderms.
According to the Embryological studies, the most ancient chordates were closely related to the ancestors of the echinoderms. Echinoderms are members of the group Phylum Echinodermata of marine animals. Some known echinoderms are starfish, and sea cucumbers.
