Question

can you tell me.... what is the second key transition of animal kingdom?​

Answer 1

Answer:

include the echinoderms and the chordates. Deuterostomes evolved from protostomes more than 630 million years ago. another key transition in the animal body is plan. In highly segmented animals, each segment can develop a more or less complete set of adult organ systems.

Explanation:

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Answer 2

Answer:

include the echinoderms and the chordates. Deuterostomes evolved from protostomes more than 630 million years ago. another key transition in the animal body is plan. In highly segmented animals, each segment can develop a more or less complete set of adult organ systems.