1. A flexible, supporting structure uncovered only in chordates is the notochord. The correct option amongst all the choices that are provided in the question is the second option.2. "Sea stars" is the one among the complying with species that ancient chordates room thought to it is in most very closely related to. The correct option amongst all the options that are offered in the inquiry is the critical option.

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urbanbreathnyc.com:

A flexible , supporting framework that are uncovered in chords room (a) Notochord (b) sea stars (c) the fish through leg prefer fins was the critical to evolve (d) worm (e) fish.

Explanation:

If the notochord is a versatile rod made the end of a material similar to cartilage. The species has a notochord at any kind of stage of its life cycle. The vertebrates space notochord the becomes part of the vertebral column.

sea stars room star-shaped echinoderms belonging to the course of Asteroidea. Echinoderms are much more closely associated the (vertebrates) 보다 to the most other animals, the both belong to the same old branch of life Sea stars, also known together starfish, room neither fish nor stars.

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urbanbreathnyc.com:

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Explanation:

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