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1. çåœã®èµ·æº
æ°Žã®ååš: å°çã圢æãããçŽ46å幎åãããæ¶²äœã®æ°Žãååšãããããçåœã®èªçã«å¿ èŠãªç°å¢ãæäŸããŸããã
åå§çãªååŠåå¿: çåœãèªçããããã«ã¯ãç°¡åãªææ©ååã圢æãããå¿ èŠããããŸãããããã«ã¯ãé·ã玫å€ç·ãªã©ã®ãšãã«ã®ãŒãé¢äžããŠãããšèããããŠããŸãïŒãã©ãŒïŒãŠãªãŒå®éšãªã©ïŒã
æåã®çç©: çŽ35ã40å幎åã«ãæåã®å现èçç©ïŒåæ žçç©ïŒãåºçŸãããšãããŸãã
2. é²åã®éçš
现èã®é²å: åæ žçç©ã¯ãDNAãæã¡ãããŸããŸãªç°å¢ã«é©å¿ããŠé²åããŸãããæãå€ããã®ãšããŠã嫿°æ§çްèãå€çްèããããŸãã
å åæã®åºçŸ: çŽ30å幎åã«ãå åæãè¡ãã·ã¢ããã¯ããªã¢ãçŸããŸãããããã«ãããé žçŽ ã倧æ°äžã«æŸåºãããå°çã®ç°å¢ã倧ããå€åããŸããïŒå€§é žåã€ãã³ãïŒã
çæ žçç©ã®é²å: çŽ20å幎åã«çæ žçç©ãåºçŸãããã®åŸãè€éãªçç©ãé²åããŠãããŸãã现èå ã®ãªã«ã¬ãã©ïŒããã³ã³ããªã¢ãèç·äœãªã©ïŒãå ±çã«ãã圢æããããšèããããŠããŸãã
3. 倿§æ§ã®æ¡å€§
å€çްèçç©ã®åºçŸ: çŽ6å幎åã«å€çްèçç©ãåºçŸããããé«åºŠãªçåœã®é²åãå§ãŸããŸããã
èæ€åç©ããã³éžäžçåœã®é²å: éé¡ãäž¡çé¡ãç¬è«é¡ãåºä¹³é¡ãªã©ã®é²åãçµãŠãæçµçã«ãããå«ãé«ççç©ãèªçããŸããã
4. çŸä»£ã®çç©å€æ§æ§
å°çäžã®çç©ã¯ãæ°åå幎ã®é²åã®éçšãçµãŠã倿§ãªåœ¢æ ãçæ ãæã€ã«è³ã£ãŠããŸããæ°Žã®ååšã¯ããããã®å€æ§æ§ãæ¯ããéèŠãªèŠçŽ ã§ããç¶ããŠããŸãã
ãã®ããã«ãæ°Žã¯çåœã®èªçãšé²åã«ãããŠäžå¿çãªåœ¹å²ãæãããŠãããä»åŸããã®ç ç©¶ã¯ç¶ããŠããã§ãããã
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1. åå§çãªç°å¢
å°çã®æ¡ä»¶: çŽ35ã40å幎åã®å°çã¯ãæž©æã§æ¶²äœã®æ°Žãååšããç°å¢ã§ãããããã«ãããååŠåå¿ãé²ã¿ããããçåœã®èµ·æºã«é©ããæ¡ä»¶ãæŽããŸããã
2. ååŠé²å
ææ©ååç©ã®çæ: é·ã玫å€ç·ãç«å±±ã®æŽ»åãªã©ã®ãšãã«ã®ãŒæºããç¡æ©ç©ããææ©ç©ãåæããåå¿ãåŒãèµ·ããããšèããããŠããŸããããã«ãããã¢ããé žããã¯ã¬ãªãããªã©ã®çåœã®åºç€ãšãªãç©è³ªãçæãããŸããã
3. èªå·±è€è£œã®ã¡ã«ããºã
RNAã¯ãŒã«ã仮説: RNAãåæã®çåœã®éºäŒç©è³ªãšãªããèªå·±è€è£œã®èœåãæã€ååãšããŠæ©èœããå¯èœæ§ããããŸãããããé²åã®åºçºç¹ãšãªã£ããããããŸããã
4. 现èã®åœ¢æ
èã®åœ¢æ: ææ©ååãéåããè質äºéå±€ã圢æããŠçްèèãäœãåºãããšèããããŠããŸããããã«ãããå å€ã®ç°å¢ãåºåããååŠåå¿ãèµ·ããå ŽãæäŸããŸããã
5. èªç¶éžæ
é©å¿ãšé²å: åæã®å现èçç©ã¯ãç°ãªãç°å¢æ¡ä»¶ã«é©å¿ããéçšã§ããã¥ã©ã«ã»ã¬ã¯ã·ã§ã³ã«ãã£ãŠé²åããŸãããããã¯ããšãã«ã®ãŒæºãå©çšããèœåãç°å¢ã«å¯Ÿããèæ§ãæã€åäœãçåãããããªãããšãæå³ããŸãã
以äžã®èŠå ãåããããå现èçç©ïŒåæ žçç©ïŒãèªçãããšèããããŠããŸãããã®ããã»ã¹ã¯é·ãæéããããŠé²è¡ããæçµçã«ã¯å€æ§ãªçç©çŸ€ã圢æãããåºç€ãšãªããŸããã
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1. éå£ç掻ã®éå§
现èã®éå: å现èçç©ãäºãã«éãŸãã圢æããéå£ïŒã³ãããŒïŒãèªçããŸãããããã«ããã现èå士ã®çžäºäœçšãååãä¿é²ãããŸãã
2. ååãšåæ¥
æ©èœã®åæ¥: éå£å ã®çްèãç¹å®ã®åœ¹å²ãæã€ããã«ãªããäŸãã°ããã现èã¯æ é€ãåã蟌ã圹å²ãå¥ã®çްèã¯éåãæ åœããããšããããã«ãæ©èœãååããŠãããŸããã
3. 现èéã®ã³ãã¥ãã±ãŒã·ã§ã³
ã·ã°ããªã³ã°: 现èéã§ã®æ å ±äŒéïŒã·ã°ããªã³ã°ïŒãé²åãã现èå士ã®ååãåæ»ã«ããããšã§ãç¹å®ã®è¡åãæ©èœã調æŽã§ããããã«ãªããŸããã
4. 现èã®æ¥ç
çŽ°èæ¥çç©è³ª: 现èãæ¥çããããã®ç©è³ªïŒäŸãã°ãã¿ã³ãã¯è³ªãªã©ïŒãé²åãã现èå士ã坿¥ã«çµåããããšã§ãããæ§é çãªçµç¹ã®åœ¢æãå¯èœãšãªããŸããã
5. é²åçéžæ
èªç¶éžæ: å现èããå€çްèçç©ãžã®ç§»è¡ããç°å¢ãžã®é©å¿ãçåã®æŠç¥ãšããŠæå©ã§ããå Žåãèªç¶éžæã«ãã£ãŠãã®ãããªåœ¢æ ãç¶æãããããã«çºå±ããŸããããã®éçšã§ã现èéå£ãç«¶äºçžæãæé£è ããã®è åšã«å¯ŸåŠããèœåãåäžããŸããã
6. éºäŒåã®å€å
éºäŒåã®è€è£œãšå€ç°: 倧ããªçްèéå£ã圢æãããäžã§ãéºäŒåã®è€è£œãå€ç°ãé²è¡ããç¹å®ã®æ©èœãæã€çްèãçãŸããããšã§ãããã«å°éåãã现èãèªçããŸããã
7. è€éãªæ§é ã®åœ¢æ
çµç¹ãåšå®ã®é²å: å€çްèçç©ãé²åããéçšã§ã现èã®çžäºäœçšã匷åãããçµç¹ãåšå®ã圢æããããŸã§ã«è³ããŸããããã«ãããããè€éã§é«åºŠãªçåœäœãèªçããŸãã
ãã®ããã«ãå€çްèçç©ã®èªçã¯ã现èã®ååãæ©èœã®ååã现èéã®ã³ãã¥ãã±ãŒã·ã§ã³ãé²åçéžæãšãã£ãè€æ°ã®èŠå ãçµã¿åããã£ãŠé²è¡ããããã»ã¹ã§ããæéããããŠãå现èããå€çްèãžãšé²åããŠãããšèšããã§ãããã
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1. èªçã®ææ
çŽ6å幎å: å€çްèçç©ã®æç¢ºãªèšŒæ ã¯ãçŽ6å幎åã®ãšãã£ã¢ã«ã©çç©çŸ€ïŒEdiacaran biotaïŒã«èŠãããŸãããã®ææã«ã¯ãè€æ°ã®çްèãååããŠæ©èœããçç©ãåºçŸããŸããã
2. èªçã®ãã£ãã
ç°å¢ã®å€å: å°çã®ç°å¢ãåçã«å€åããããšããå€çްèçç©ã®èªçãä¿ããŸãããç¹ã«ãå€§é žåã€ãã³ãïŒçŽ24å幎åïŒã«ãã£ãŠé žçŽ æ¿åºŠãäžæããããè€éãªçåœã®ååšãå¯èœãšãªããŸããã
çæ ç³»ã®è€éå: ç°å¢ã倿§åããããŸããŸãªçæ ãããã圢æãããäžã§ãæ°ããªçåæŠç¥ãšããŠå€çŽ°èæ§ãé²åããŸããã
3. é²åã®ããã»ã¹
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