| 单词 | hydrozoan |
| 例句 | The hydrozoans contain sessile forms and swimming colonial forms like the Portuguese Man O’ War. Fundamentals of Biology 2015-01-01T00:00:00Z Many hydrozoans form colonies composed of branches of specialized polyps that share a gastrovascular cavity. Concepts of Biology 2013-04-25T00:00:00Z Such hydrozoans form a subgroup of Cnidaria, a phylum whose members also include jellyfish and coral. Bizarre Blue ‘Jellyfish’ Washing Up on California Beaches Are a Sign of Spring 2023-05-03T04:00:00Z Many living things, including strawberries, orchids and some jellyfish cousins called hydrozoans, propagate this way today. The Networks That Ruled Earth’s Ancient Seas 2020-03-06T05:00:00Z They claim to have found compelling genetic evidence that at least a few members of each colony of the little marine hydrozoan were unrelated to the organism that founded it, making them chimeras. Get Big Quick? Just Graft Some Friends 2018-09-15T04:00:00Z Many hydrozoans form colonies that are composed of a branched colony of specialized polyps that share a gastrovascular cavity, such as in the colonial hydroid Obelia. Fundamentals of Biology 2015-01-01T00:00:00Z There’s probably another two thousand hydrozoan jellyfish, which is a cousin group. Secret Lives of Jellyfish: Robots, Genetics, and World Domination 2017-12-02T05:00:00Z While closely related to jellyfish they are made up of a colony of many tiny marine organisms living together called hydrozoans. Portuguese man-of-war washed up at Portheras Cove, Cornwall - BBC News 2015-07-31T04:00:00Z Sommer was conducting research on hydrozoans, small invertebrates that, depending on their stage in the life cycle, resemble either a jellyfish or a soft coral. Can a Jellyfish Unlock the Secret of Immortality? 2012-11-28T23:26:58Z Naked hydrozoa which reproduce their kind by means of buds or eggs, or by fission, without exhibiting the phenomena of alternation of generations. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The ancient seas swarmed with these living hydrozoans, and their remains are found preserved as fossils in the shales which once were beds of soft mud. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Neomenia and its allies are marine animals living at depths of 15 to 800 fathoms on soft muddy ground; they are found crawling on corals and hydrozoa, on which they feed. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" The oceanic Fauna is not a rich one; its hydrozoa do not admit of preservation; and the hard parts of its few kinds of molluscs and crustaceans and insects are mostly fragile. Essays: Scientific, Political, & Speculative, Vol. I He scanned the ocean floor for hydrozoans, gathering them with plankton nets. Can a Jellyfish Unlock the Secret of Immortality? 2012-11-28T23:26:58Z STROMATOPORA—colonies of minute hydrozoans allied to corals—grew in places on the sea floor, secreting stony masses composed of thin, close, concentric layers, connected by vertical rods. The Elements of Geology Sommer kept his hydrozoans in petri dishes and observed their reproduction habits. Can a Jellyfish Unlock the Secret of Immortality? 2012-11-28T23:26:58Z Like most hydrozoans, Turritopsis passes through two main stages of life, polyp and medusa. Can a Jellyfish Unlock the Secret of Immortality? 2012-11-28T23:26:58Z Those belong to a different taxonomic group, Scyphozoa, and tend to spend most of their lives as jellyfish; hydrozoans have briefer medusa phases. Can a Jellyfish Unlock the Secret of Immortality? 2012-11-28T23:26:58Z |
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