Question Detail
Question
Which group includes 'simple' animals like echinoderms but also 'complex' animals like chordates?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Deuterostomes include both the complex Chordata and the simpler-looking Echinodermata. This grouping is based on their shared embryonic development (anus first).
Hint
This group is defined by 'mouth second' development.