about sycon example of phylum porifera
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Answers:1. There are 3 types of symmetry in the animal phyla in order of increased complexity: (Asymmetrical, Radial, and Bilateral) An example of an animal with asymmetry is the sponge under the Poriferan phylum because they come in different shapes and sizes. Radial symmetry found only in Cniderians like hydra or jellyfish. Bilateral symmetry - tunicates, humans, starfish, worms, clams, and grasshopper. 2. Heterotrophic organisms 3. Not to sure on that means... 4. Neural fold 5. Sponges are sessile, which means they stay attached to one place. They filter in water and nutrients through the water, as well as oxygen, so it doesn't have to move. It reproduces by budding, which means it grows a little sponge out of the side of it. 6. Bilateral 7. Calcarea (calcerous sponges - having spicules), Demospongiae (horn sponges, like the bath sponge), Scleropongiae (coralline or tropical reef sponges), and Hexactinellida (glass sponges). 8. Means an animal with openings in this case "pores" 9. Anthozoa (true coral, sea anemones, sea pens), Cubozoa (box jellyfish), Hydrozoa (freshwater hydra, fire coral), Scyphozoa (true jellyfish) 10. Spicules are the only primitive form of support in sponges. 11. I'm not too sure on what you mean by compounds... 12. Respiration: Incurrent pore (where water enters), Osculum also known as the outcurrent pore (where water leaves the sponge), this all occurs in the spongocoel (body cavity that involves water circulation and where nutrients get absorbed) Answer is Spongocoel. 13. Osculum 15. Haploid cell. 16. Choanocytes (These cells just "feed" the sponge) 17. Sponges can reproduce in two ways: sexually and asexually. in sexual reproduction, they release sperm into the water in hopes that it will land inside another sponge and fertilize an egg cell. all sponges are hermaphrodites, meaning that they can produce both egg and sperm, but they can't fertilize themselves. In asexual reproduction, a small sponge will grow off the side of the parent sponge in a process called budding. some species will bud internally by packing the new sponge cells into vessicles called "gemmules," which are released into the water when the parent sponge dies. all sponges that are produced asexually are exact clones of the parent sponge. 18. Thread tube
Answers:They are predatory, express radial symmetry, and while normally sessile (sedintary) can move at will. In most bio books, the sections of the chapter that contains this info lists Porifera, then Hydra (in evolutionary order) stating advantages of the latter over the former as it moves along, so you might want to check that as well.
Answers:> Few questions about the Phylum Mollusca? One of my favorite things. They don't fly! > Warm or cold blooded? Cold > Respiratory system type of organs does it change during lifetime? Hmmm. The general answer is no. But for some marine snails which have a larval stage, yes. > What habitat can you find this group in? Most, LOL. You'll find them in pretty much all marine and permanent aquatic environments. You'll find them in terrestrial environments where there's moisture, or moist places. > Do they migrate? I can't think of any that migrate. > Are they territorial? Most aren't. Some of the octopus species are. Some of the cuttlefish are territorial around breeding time. > How do they obtain food? Most bivalves are filter feeders. Most gastropods crawl around, and rasp food from surfaces with the radula -- you'll find detrivores, herbivores, and even carnivores doing this in this group. Cephalopods actively hunt and swim after prey. > Give an example of a food chain including these animals. Marine phytoplankton -> zooplankton -> clam Marine phytoplankton -> zooplankton -> small fish -> squid -> large fish Lettuce -> snail -> human being === > What type of reproduction is representative of this group? Sexual reproduction. Bivalves: external fertilization, eggs. Gastropods: internal fertilization. Some gastropods lay eggs, and others give live birth. Cephalopods: internal fertilization, lay eggs. > How many young at a time usually? Bivalves: thousands. Gastropods: the ones that lay eggs will lay somewhere between a dozen and a couple hundred at a time. The ones that give live birth have one at a time. Cephalopods: hundreds. > How often do they reproduce in a year? Bivalves: Hm, I don't know. Total guess: they reproduce about 26 times a year, timed by the tides. Gastropods: The ones that lay eggs will do so whenever they have some to lay. If the weather is good, every couple of weeks, I'd guess. The ones that give live birth will do so continuously in good conditions -- the adult Malaysian trumpet snails in my aquarium would give birth each and every day. Cephalopods: Once a year, I think.
Answers:1. The correct word is "phyla," not "phylums." 2. You need to do your own homework. I would be happy to help with specific questions, but not an entire homework assignment.