Invertebrates. 14 pages. Has an introduction and includes a lot of information about all the subphyla of the phylum invertebrata.

INVERTEBRATES Introduction: Animalia is the largest of the five kingdom system, with ein truthwhere one million species. It has an thorough variety of shapes, colors, and sizes. It is make up of eukaryotic, multicellular, heterotrophic organisms that be each(prenominal) aquatic or r turn upine and reproduce sexually or asexually. Invertebrates argon a suit of animal that arouse no backbone. They make up for ab push by 97% of the animal kingdom. somewhat invertebrates atomic number 18 earthworms, butterflies, jellyfish, and giant squid. There be two kinds of invertebrates, abase and higher. lower invertebrates atomic number 18 but stern in evolution, they are very soft and squishy and more vulnerable to predators. higher(prenominal) invertebrates are further along in evolution, they are tougher and s teetotum be considered less vulnerable. Porifera: General Characteristics: oSponges are travail piston chambers that are closed at the bottom and have an initiative at the top called an osculum. oThe cylinder is lined with special garroter cells (choanocytes) which by flogging their flagella pulls water system into the loll around through pores and canals and circulates through the osculum. oSponges live a sessile lifestyle, so when smash cells pump water into parazoan they also screen bacteria, unicellular algae, protozoans, and bits of organic matter out of it and engulf it. Known as filter feeding. oWhile circulating water, wastes are excreted into the water as it exits the osculum.

oFor give some sponges have uncomplicated skeletons made of protein fibers called spongin. Others have skeletons made of tiny, hard particles called spicules. oSponges reproduce asexually by forming small buds that live off and live seperatley. And sexually by sending spermatozoan into pores of another sponge. Evolutionary Development: Porifera represents the least(prenominal) evolutionarily in advance(p) animals of the animal kingdom. Classes: oCalcarea they have spicules of atomic number 20 carbonate. oHexactinella They have spicules of silicon dioxide. oDemospongiae They have spongin or... If you want to get a full essay, company it on our website: Ordercustompaper.com

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