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Question
Which of these phyla has the greatest evolutionary similarity to phylum Chordata?
Which of these phyla has the greatest evolutionary similarity to phylum Chordata?
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Solution
The correct option is D Echinodermata
- Echinodermata and Chordata are the two phyla that are highly similar (in terms of evolution) as they both belong to the deuterostome super-phylum, exhibiting somewhat similar patterns of early development during the embryonic stage.
- But their differences are more significant than their similarities.
- All echinoderms are marine. While many chordates, including humans, live on land.
- Examples of echinoderms include brittle stars, sand dollars, sea stars, sea lilies, sea urchins, and sea cucumbers.
- Most chordates, though not all, are vertebrates. All amphibians, birds, fish, lampreys, mammals, and reptiles are chordates.
Thus, the correct answer is option D.
- Echinodermata and Chordata are the two phyla that are highly similar (in terms of evolution) as they both belong to the deuterostome super-phylum, exhibiting somewhat similar patterns of early development during the embryonic stage.
- But their differences are more significant than their similarities.
- All echinoderms are marine. While many chordates, including humans, live on land.
- Examples of echinoderms include brittle stars, sand dollars, sea stars, sea lilies, sea urchins, and sea cucumbers.
- Most chordates, though not all, are vertebrates. All amphibians, birds, fish, lampreys, mammals, and reptiles are chordates.
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