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The composition of their Skeletons.
The Calcarea have single nucleus, single external membrane cells. Their 'Spicule' (Structural Element) is Calcite. They commonly have a massive Calcite exoskeleton
The Glass Sponges cells are mostly syncytia (large structure filled with cytoplasm and many nuclei), and their Spicule is Silica. They never have an exoskeleton.
Finally, the Demosponges have the same calls as the Calcarea, but their Spicule is Silica, like the Glass Sponges. Some species have an exoskeleton, which will be formed of Aragonite if present.
What else can I help you with?
What are Consumer characteristics?
Consumer characteristics are used to segment markets into workable groups
What to characteristics can be used to divide igneous rocks into groups?
i have no clue!
Another name for characteristics?
* features - most similar to characteristics, tends a bit toward things something can do * properties - usually used to designate the physical and chemical characteristics of some material * qualities - tends toward the characteristics something must have rather than is just likely to have
What characteristics do scientists used to classify vertebrates into smaller groups?
The five groups are Fish, Amphibians, Reptiles, Birds, Mammals
How are sponges made?
sponges are naturally grown in the ocean floor and then harvested and dried to be used.
How can commas be used?
Commas are used often as a pause or transition, or to designate single lists, unlike the semicolon's use to designate separation or transition between lists.The Book, The Map, and The Atlas.It can also be used to designate interjection.Please, don't do that.Now,
What two-letter suffix is used to designate a Spain Internet address?
The two letter suffix used to designate a Spain internet address is es.
How should you use their and there?
There is used to designate a location. Their is a possessive of they.
Are used to designate each column's location?
column
What is used to describe or designate rows in a spreadsheet?
row
Are kitchen sponges made up of the real marine sponges?
No, kitchen sponges nowadays are usually made from cellulose or synthetic plastics. Real marine sponges were used by early Europeans to also clean, but it was stopped due to overfishing that almost brought the sponges to extinction.
What characteristics did carolus linnaeus use to place organisms into groups and sub groups?
Linnaeus used physical characteristics such as morphology, anatomy, and reproductive structures to place organisms into groups and subgroups. He also considered the number of stamens and pistils in plants and the teeth and jaw structure in animals to classify them.
