Sexual and asexual reproduction of the fissiparous asteroid Coscinasterias acutispina(Stimpson)was studied in two populations(Kurosaki and Uozu)in Toyama Bay, Sea of Japan, during April 1998-March 1999(Kurosaki)and April 1998-October 1999(Uozu). A total of 96% and 87% of all starfish collecte...
,Villar,and,F.,Lefèvre 摘要: The balance between sexual and asexual propagation in the establishment of natural stands of Populus nigra was assessed from the genotypes of trees sampled in different natural stands. One site was completely sampled and genotyping proceeded using STS and RAPD markers....
Here we report results of a one-year survey of sexual reproductive stages in a rope-form verongid, Aplysina cauliformis, which test the hypotheses of verongiid sexual pattern and reduced resource allocation to sexual reproduction in rope-form sponges. Results confurn the verongiid pattern of ...
... ) sexual and asexual reproduction 有性和无性生殖 ) Asexual and sexual reproduction 无性繁殖和有性生殖 ... www.dictall.com|基于2个网页 2. 无性生殖跟有性生殖 美国高中培训... ... 11. Regulatory of cell cycle 细胞周期的调节 1. Asexual and sexual reproduction 无性生殖跟有性生殖 .....
The evolution and maintenance of sexual reproduction is believed to involve important tradeoffs. Queens of social insects face a dilemma over the costs and benefits of sexual and asexual reproduction. Asexual reproduction by a queen doubles her contribution to the gene pool. However, overuse of asexu...
To quantify the effect of reproduction on the reversibility of yeast cell size, I employed a long-term (1300 generations) selection experiment. In the first 500 generations (Chapter 1), adaptation to a stable and benign abiotic environment occurred for all populations. Sexual reproduction was ...
The combined use of mitochondrial DNA markers and polymerase chain reaction (PCR) techniques has greatly enhanced evolutionary studies. These techniques have also promoted the discovery of mitochondrial-like sequences in the nuclear genomes of many animals. While the nuclear sequences themselves are inte...
(2002) Sexual and asexual reproduction of the holothurian Stichopus chloronotus (Echinodermata): a comparison between La Réunion (Indian Ocean) and east ... C Conand,SU&T Hoareau - 《Invertebrate Reproduction & Development》 被引量: 74发表: 2002年 Sexual and asexual reproduction of the holoth...
Current treatment options are limited to drugs treating the symptoms and do not slow or reverse disease progression. Thus, a disease modifying drug would be a major therapeutic breakthrough towards treatment of the disease. The formation of A β fibrils and their deposition into neurotoxic amyloid ...
Individual size, rate of growth, and mode and frequency of asexual reproduction are life-history traits of primary importance for sea anemones. These traits determine sexual reproductive output, affect an individual's probability of survival, and are crucial in adapting an individual to its environme...