نتایج جستجو برای: spicules
تعداد نتایج: 919 فیلتر نتایج به سال:
All metazoan animals comprise a body plan of different complexity. Since--especially based on molecular and cell biological data--it is well established that all metazoan phyla, including the Porifera (sponges), evolved from a common ancestor the search for common, basic principles of pattern formation (body plan) in all phyla began. Common to all metazoan body plans is the formation of at leas...
Recent high-resolution imaging and spectroscopic observations have generated renewed interest in spicules' role explaining the hot corona. Some studies suggest that some spicules, often classified as type II, may provide significant mass energy to Here we use numerical simulations investigate whether such spicules can produce observed coronal emission without any additional heating agent. Model...
Recent studies on deep-sea sponges have focused on mapping contemporary distributions while little work has been done to map historical distributions; historical distributions can provide valuable information on the time frame over which species have co-evolved and may provide insight into the reasons for their persistence or decline. Members of the sponge family Geodiidae are dominant members ...
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