Evolution can explain why human embryos look like gilled fishes.进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样.A sharp demarcation of adventive embryos from zygotic embryos cannot be drawn.不定胚与合子胚之间不能划分出明显的界限.Most grass embryos have a fla...
Evolution can explain why human embryos look like gilled fishes.进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样.Early division phase embryos may use metabolites provided by the suspensor, persistent and degenerating synergids.早期分裂时期的胚可以利用胚...
But the company can be a harsh overlord to its crofters.但是公司对其佃户和工人可以作威作福,苛刻异常.Asking around, he discovered that land speculators were buying land from innocent crofters.各处调查后, 他发现土地投机商正向头脑简单的佃户购进田地....
这些火焰造成了对流漏斗，把许多微粒抛向上层大气。These fires create convection funnels, and throw a lot of particles into the upper atmosphere.这漏斗的顶上接了一根管子.The top of the funnel is connected to a tube.始新统砂层的 漏斗形 自然电位曲线形态很明显.The funnel - shaped s...