打字猴:1.700238697e+09
1700238697 陆地最大的动物大象,寿命将近百岁,孕期能达到22个月,是孕期最长的哺乳动物。小象在母亲体内发育了将近两年,一出生便有上百斤,出生几小时便能走路。
1700238698
1700238699 从全世界的脊椎动物来看,孕期最长的是一种叫皱鳃鲨的鲨鱼。它是鲨鱼中最原始的一种,生活在深海,长得异常奇葩,头部长着巨大的、皱巴巴的鳃裂,看着简直像史前怪物。皱鳃鲨平均寿命只有25岁,但它的孕期却长达42个月,刚好跟传说中哪吒在母腹中待的时间“三年六个月”一样,是名副其实的动物中的“哪吒三太子”。一般的鱼都是直接产卵,然后由鱼卵孵化出小鱼;而皱鳃鲨是卵胎生,产卵后等鱼卵在自己体内孵化出小鲨鱼,再将宝宝直接生出。这整个过程都是在皱鳃鲨母体内进行的,也难怪需要这么长的时间了。
1700238700
1700238701
1700238702
1700238703
1700238704
1700238705
1700238706
1700238707 参考资料
1700238708
1700238709 1. 杰拉德·戴蒙德. 第三种猩猩:人类的身世与未来[M].王道还,译.海南: 海南出版社,2004.
1700238710
1700238711 2. Mujugira A., Osoti A., Deya R., et al. Fetal head circumference, operative delivery, and fetal outcomes: a multi-ethnic population-based cohort study[J]. BMC Pregnancy Childbirth . 2013 May 7;13:106.
1700238712
1700238713 3. 世卫报告:全球人口平均寿命71岁. 中时电子报.
1700238714
1700238715 4. Murchison and Adams:Sequencing Skippy: the genome sequence of an Australian kangaroo, Macropus eugenii[J]. Genome Biology 2011,12:123.
1700238716
1700238717 5. Ú Árnason,et.al. Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow[J]. Sci. Adv . 2018;4:eaap9873.
1700238718
1700238719 6. E. Palkopoulou, M. Lipson, S. Mallick, S. Nielsen, N. Rohland. A comprehensive genomic history of extinct and living elephants[J].Proceedings of the National Academy of Sciences ,2018, 115 (11) :201720554.
1700238720
1700238721 7. Venkatesh B., Kirkness E.F., Loh Y.H., Halpern A.L., Lee A.P., et al.(2007) Survey sequencing and comparative analysis of the elephant shark(Callorhinchus milii) genome[J]. PLoS Biol .2007,5(4): e101.
1700238722
1700238723 8. B. Venkatesh, et. Elephant shark genome provides unique insights into gnathostome evolution[J]. Nature .2014 Jan, 505, 174–179.
1700238724
1700238725 9. C.T. Amemiya, et. The African coelacanth genome provides insights into tetrapod evolution[J]. Nature .2013 Apr 18;496(7445):311-6.
1700238726
1700238727
1700238728
1700238729
1700238730 生命密码:你的第一本基因科普书 [:1700236018]
1700238731 生命密码:你的第一本基因科普书
1700238732
1700238733
1700238734
1700238735
1700238736
1700238737
1700238738
1700238739
1700238740 生命密码:你的第一本基因科普书
1700238741
1700238742 扫码听尹烨对每篇文章的详解
1700238743
1700238744
1700238745
1700238746
[ 上一页 ]  [ :1.700238697e+09 ]  [ 下一页 ]