| 单词 | chordate |
| 例句 | A long, thin dorsal hollow nerve cord runs the length of the chordate, along the top. Fundamentals of Biology 2015-01-01T00:00:00Z The nerve cord found in most chordate embryos develops into the brain and spinal cord, which compose the central nervous system. Concepts of Biology 2013-04-25T00:00:00Z The lancelet is a chordate, fish-like filter feeder that buries itself in marine sands. Biology for AP Courses 2022-06-09T00:00:00Z The Chordate Cladogram presents current hypotheses about evolutionary relationships among chordate groups. Miller & Levine Biology 2018-01-01T00:00:00Z Having sketched that picture, he traces the evolution of definitive vertebrate characteristics by mining rich new studies from neglected chordate groups, from lancelets and tunicates to hagfish and lampreys. The backbone begins: a spine-tingling story 2018-07-02T04:00:00Z The dorsal hollow nerve cord is part of the chordate central nervous system. Concepts of Biology 2013-04-25T00:00:00Z The chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and in the adult stage of some chordate species. Concepts of Biology 2013-04-25T00:00:00Z During chordate evolution, partitions evolved that divided the original two chambers into four. Miller & Levine Biology 2018-01-01T00:00:00Z One chordate fossil of a worm from the Cambrian Period included paired muscles arranged in a series, similar to those of modern chordates. Miller & Levine Biology 2018-01-01T00:00:00Z |
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