... ) 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 .....
Asexual reproduction, including parthenogenesis in which embryos develop within a female without fertilization, is assumed to confer advantages over sexual reproduction, which includes a "cost of males." Sexual reproduction largely predominates in animals, however, indicating that this cost is outweighed ...
However, in some organisms, such as fungi, asexual reproduction alternates with episodic sexual reproduction events. Fungi are thus appropriate organisms for studies of the reasons for the selection of sexuality or clonality and of the mechanisms underlying this selection. Magnaporthe oryzae, an ...
美[eɪˈsekʃuəl] 英[eɪˈsekʃʊəl] adj.无性的;无性器官的;性缺乏的;性冷淡的 网络无性别的;无性恋;无性恋者 权威英汉双解 英汉 英英 网络释义 asexual 显示所有例句 adj. 1. 无性的;无性器官的not involving sex; not having sexual organs ...
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...
Few studies have investigated the reproductive strategies of clonal plants simultaneously both from sexual and asexual perspectives. 展开 关键词: clonal growth variation of sexual reproduction clonal architecture mating system trade-off DOI: 10.1007/s11515-007-0036-0 被引量: 185 ...
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. Among 118 trees, only four wer...
Six estimates of resource allocation to sexual reproduction (nectar concentration, nectar volume, sugar production, pollinator visitation rates, fruit-set, and seed production) and a single estimate of resource allocation to asexual reproduction (the rate of rooted-branch production) were examined for ...
The sexual reproductive pattern of the main macrosymbiont (parasite) polychaete, Haplosyllis spongicola, shows no correlation to that of its sponge host. 展开 关键词: Verongida Aplysina Haplosyllis sexual reproduction body-form DOI: 10.1080/07924259.1997.9672598 被引量: 46 ...
We present results from a series of experiments designed to determine relative incidences of sexual (flowering) and asexual (fragmentation) reproduction at salinities commonly encountered in these estuaries (0, 5, 15psu). Because fragmentation is thought to be responsible for milfoil spread in ...