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- 1520568
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- 2022-6-4
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- 1970-1-1
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main idea: origin of vertebrate
structure:
p1. introduces the question on the origin of vertebrate and theory
-vertebrate - protochordate: t&l ➡️ controversy but similar in many ways
-ancestor chordates: lack of organ system
-advancements: sense organs/ muscle blocks➡️ swim/urine by filter blood/a large brain to store Information./metabolic capacity/tissue: bone/ endocrine organs/ kidney
p2.natural selection favored the evolution
-two more questions: in what environment & what forces determine
new words:
endocrine: 内分泌的
tissue: 组织 |
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