| 词汇 | unicellular |
| 释义 | unicellular adjective biology specializeduk /ˌjuː.nɪˈsel.jə.lər/ us /ˌjuː.nɪˈsel.jə.lɚ/ A unicellular organism is made of only one cell: （生物）单细胞的 Most algae are unicellular.大多数藻类都是单细胞生物。 Compare multicellular Cells actin anaphase anti-platelet assort axoplasm histochemistry histography homologous chromosomes infiltration intercellular neoplasia nerve fibre neurofibril neurofibrillary neuroglia teratoma tetrad thrombocyte thymocyte turgor unicellular | American Dictionaryunicellular adjective[ not gradable ] us/ˌju·nəˈsel·jə·lər/ biology describes a living thing that is made of only one cell Examples of unicellularunicellular In particular, a unicellular organism corrects direction of its own motion reacting to changes in the environment. Sponges have no nervous systems at all and hence no individuality in the sense that ordinary unicellular and multicellular organisms are individuals. Bacteria are frequently said to be typical unicellular organisms. Three papers review important areas in unicellular complexity. On the basis of their dimensions and morphological considerations, the sphaeromorph acritarchs are interpreted as probably representing the resistant, reproductive cysts of unicellular protists. Unicellular organisms may respond by using complex taxis. Permanent gross leakage, which may result from imbibitional stress, inevitably leads to cell death in unicellular organisms. All zones are produced by filamentous fungi (mycobionts) and unicellular green algae (phycobionts), which together form a symbiotic lichen association. It is suggested that their original role in evolution probably was to promote cell growth and division of unicellular organisms by turning over cell-wall -1,3glucans. A multicellular organism must, and a unicellular organism may, sometimes grow. Molecular trees show that the transition of unicellular eukaryotes to multicellularity occurred multiple times in distinct lineages. While the river does not support complex metazoan life (although rotifers and insect larvae have been observed), unicellular eukaryotes are abundant and more diverse than prokaryotes. Although the variances were high, there was some indication that unicellular bacteria numbers were not closely correlated with soil type but that filamentous bacteria and fungi could have been. An early impression of previously determined flows suggests that in an essentially unicellular oscillatory flow, the thermals originate symmetrically from the centre of the upper and lower boundaries. Sporangiospores (4-11 m diam) are produced in the sporangium and are unicellular, ovoid and brown. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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