Question

Deuterostome condition and indeterminate radial cleavage are characteristics of

• A. Chordates and arthropods
• B. Chordates and echinoderms
• C. Arthropods and echinoderms
• D. Chordates, arthropods and annelids

Answer 1

The correct option is B Chordates and echinoderms

Chordates and echinoderms are deuterostomes in which the embryonic blastopore forms anus. Annelids and arthropods are protostomes in which the embryonic blastopore forms the mouth. Deuterostomes show indeterminate radial cleavage during early embryonic development meaning that the fate of the embryonic cell in early stages is not decided and each cell can give rise to the complete embryo. The radial cleavage describes the plane of cleavage in relation to the vertical axis

So, the correct answer is 'Chordates and echinoderms'