Evolution of Anuran Life Cycles
نویسندگان
چکیده
منابع مشابه
Phylogeny of Medusozoa and the evolution of cnidarian life cycles
The considerable morphological disparity present within Cnidaria is evidenced by delicate siphonophores, massive medusae and corals, feathery hydroids, interstitial polyps and box jellies possessing complex eyes. Despite this diversity, these relatively simple metazoans are united in possessing nematocysts, most probably as a result of common ancestry. Corroborating evidence that cnidarians are...
متن کاملThe evolution of life cycles with haploid and diploid phases
Sexual eukaryotic organisms are characterized by an alternation between haploid and diploid phases. In vascular plants and animals, somatic growth and development occur primarily in the diploid phase, with the haploid phase reduced to the gametic cells. In many other eukaryotes, however, growth and development occur in both phases, with substantial variability among organisms in the length of e...
متن کاملPhenotypic Heterogeneity and the Evolution of Bacterial Life Cycles
Most bacteria live in colonies, where they often express different cell types. The ecological significance of these cell types and their evolutionary origin are often unknown. Here, we study the evolution of cell differentiation in the context of surface colonization. We particularly focus on the evolution of a 'sticky' cell type that is required for surface attachment, but is costly to express...
متن کاملSelection and the evolution of genetic life cycles.
The evolution of haploid and diploid phases of the life cycle is investigated theoretically, using a model where the relative length of haploid and diploid phases is under genetic control. The model assumes that selection occurs in both phases and that fitness in each phase is a function of the time spent in that phase. The equilibrium and stability conditions that allow for all-haploid, all-di...
متن کاملDevelopmental plasticity and the evolution of animal complex life cycles.
Metazoan life cycles can be complex in different ways. A number of diverse phenotypes and reproductive events can sequentially occur along the cycle, and at certain stages a variety of developmental and reproductive options can be available to the animal, the choice among which depends on a combination of organismal and environmental conditions. We hypothesize that a diversity of phenotypes arr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 1974
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.185.4148.377