The least you can hope for from life is that the struggle for survival will wait until after your birth. Innature, though, you can never rest easy, not even within your mother. A sand tiger shark may start with as many as 12 fertilized eggs inside her, but usually, only two will eme...
我来说两句 短评 ··· 热门 / 最新 / 好友 还没人写过短评呢 我要写书评 Plant Life (Cycles in Nature)的书评 ··· ( 全部0 条 ) 论坛 ··· 在这本书的论坛里发言 + 加入购书单 谁读这本书? ··· edy 2008年12月15日 想读 > 1人想读 二手市场 ··· 在豆瓣转让 有...
Here we describe an experiment in which simple cooperating lineages of bacteria were propagated under a selective regime that rewarded collective-level persistence. Collectives reproduced via life cycles that either embraced, or purged, cheating types. When embraced, the life cycle alternated between ...
Relationships Between Prey Life-Cycles and the Extent, Nature and Timing of Seal and Seabird Predation in the Scotia Sea 来自 Springer 喜欢 0 阅读量: 49 作者:JP Croxall,PA Prince,C Ricketts 出版社: Springer Berlin Heidelberg 摘要: The impacts of seals and breeding seabirds on prey resources ...
Fig. 1: Divergence of mitotic machinery in the Ichthyosporea with different life cycles. a, Differences in life cycles and the uninucleated and multinucleated states of dermocystidC. perkinsii(Cper), ichthyophonidsA. appalachense(Aapp), S. arctica(Sarc),C. fragrantissima(Cfra) and coralloch...
The evolution of complex life cycles when parasite mortality is size- or time-dependent In complex cycles, helminth larvae in their intermediate hosts typically grow to a fixed size. We define this cessation of growth before transmission to th... MA Ball,GA Parker,JC Chubb - 《Journal of The...
When observing temporal scales, the wide variety of life cycles of the organisms is rather important in considering the effect of the duration of the exposure: as an example, generation times can be less than a day for bacteria to years for plants and animals. The interaction of such spatial...
Draw an arrow that points back to the eggs. Life cycles are continuous and keep repeating over and over. The full grown frog will find a frog to love and to make more baby frogs with and begin the life cycle of a frog all over again. It’s the circle, the circle of life. If you...
in the process of cell diversification; however, there is another possibility to provide diverse “stems” and their clones. This “fresh” idea about recurrent (iterative) cycles of carcinogenesis that imply successive production of less complex generations of malignant cells is described in sec...
The complex life cycles of parasites are among the most fascinating aspects of their biology.Cryptosporidiumis a minute protist with a highly reduced genome, and yet it continuously transforms itself into a menagerie of specialized stages that amplify asexually, transform into male and female gametes...