ascidian वाक्य
उदाहरण वाक्य
मोबाइल
- The most numerous group is the ascidians; fewer than 100 species of these are found at depths greater than.
- Ascidians are found all over the world, usually in shallow water with substratum, such as rocks and shells.
- However, most solitary ascidians that are encountered are so covered in algae that the coloration is often not visible.
- Vanabins are found almost exclusively in the blood cells, or vanadocytes of some ascidians and tunicates ( sea squirts ).
- It is an ascidian, a member of a group of animals called tunicates that includes things like sea squirts _ resembling anemones.
- Ascidians are almost all hermaphrodites and each has a single ovary and testis, either near the gut or on the body wall.
- But one group, the molgulid ascidians, have evolved tailless species on at least four separate occasions, and even direct development.
- These derivatives may either result from a " P . areolatus " symbiont or may come from feeding on the ascidian.
- Water is drawn into the ascidian through the buccal ( oral ) siphon and leaves the atrium through the atrial siphon ( cloacal ).
- Exceptions to this rule are the sperm chemoattractants of corals, ascidians, plants such as ferns, and algae ( Table 1 ).
- "P . mammillata " is one of a small number of ascidians that accumulate the element vanadium in their blood cells.
- Solitary ascidians release many eggs from their atrial siphons; external fertilization in seawater takes place with the coincidental release of sperm from other individuals.
- They are protandrous hermaphrodites, except for " Oikopleura dioica " which is gonochoric, and a larva resembles the tadpole larva of ascidians.
- In the colonies of the colonial ascidian-cyanophyte symbiosis Trididemnum solidum, their colors are different depending on the light regime in which they live.
- The Brachyury ( T ) gene, which is expressed in the ascidian notochord, is not expressed in the stomochord, and collagen is absent.
- It is considered of ascidian affinity, due to the sac-like morphology and a series of distinctly perforated bands reminiscent of a tunicate pharynx.
- If " B . hunti " is a tunicate, it could be the oldest ascidian fossil known as of its publication in 2012.
- This solitary ascidian is sometimes referred to as the " red-throated ascidian ", as its two siphons are a vivid red in colour.
- This solitary ascidian is sometimes referred to as the " red-throated ascidian ", as its two siphons are a vivid red in colour.
- In 1845, he first announced the presence in the test of some Ascidians of what he called " tunicine ", a substance very similar to cellulose.
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