[揽瓜阁精读] 262. 大熊猫Giant Panda和red bear

janelcr · 发表于 2023-2-28 21:17:07

Mark一下！

PalePink_Mandy · 发表于 2023-2-28 21:23:10

mark

XX829412 · 发表于 2023-2-28 21:37:05

• panda： enigma
○ biologist： bears in the family Ursidae(熊科）
§ Caccons: procyonidae(浣熊科）
§ Own family: Ailu
○ Controversy
§ 1869 [P A David]: new to science = Ursys mela (black+white bear）
§ 1870 [A M Edwards]: skeleton→ Ailu ful(red panda, not bear)
□ Bearlike? : ancestor common to both bears and raccoons (Ailu mela)
§ 1964 [D.D Davis]: anatomy of Ailu → bear family
§ [DM][RFE]: behabioral and morphological → racoon family
§ [JFE]&[GBS]: own family→ ailu
□ Endorsed by Chinese scientists
○ Difficulties: Homologous VS analogous
§ Homologous:
□ common descent
® e.g. class Mannalis
® Cat family
□ Closely ↑ → number of traits ↑
□ Genetic basis is rarely understood
® Multiple genetic change → small change
® Small gentic change → major change
§ Analogous
□ Similarity to convergence
® Wings of birdas & insects
® Confound the deductive process

taylor_2008 · 发表于 2023-2-28 22:17:07

同意！

ada_tan1127 · 发表于 2023-2-28 23:36:38

mark

MarginSheep · 发表于 2023-3-1 00:37:40

感谢！！！

Meredith1808 · 发表于 2023-3-1 06:34:47

Mark一下！

mitxinying2022 · 发表于 2023-3-1 07:30:45

mark

Gyllion · 发表于 2023-3-1 09:14:18

看一下！

slowdiving · 发表于 2023-3-1 11:32:15

感谢分享！

[揽瓜阁精读] 262. 大熊猫Giant Panda和red bear

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