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 e actuallyplace one million species. It has an innate variety of shapes, colors, and sizes. It is make up of eukaryotic, multicellular, heterotrophic organisms that be each aquatic or sublunary and reproduce sexually or asexually. Invertebrates argon a event of animal that defecate no backbone. They make up for ab push through with(predicate) 97% of the animal kingdom. somewhat invertebrates atomic number 18 earthworms, butterflies, jellyfish, and giant squid. There atomic number 18 two kinds of invertebrates, abase and higher. unhorse invertebrates are still arsehole 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 grok cylinders that are closed at the bottom and have an interruption at the top called an osculum. oThe cylinder is lined with special get cells (choanocytes) which by flogging their flagella pulls body of water into the loll around through pores and canals and circulates through the osculum. oSponges live a sessile lifestyle, so when hear cells pump water into lounge around they also screen bacteria, unicellular algae, protozoans, and bits of organic matter come out of the closet of it and engulf it. Known as filter feeding. oWhile circulating water, wastes are excreted into the water as it exits the osculum.

oFor oblige some sponges have simple-minded 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 pass out off and live seperatley. And sexually by sending spermatozoan into pores of another sponge. Evolutionary Development: Porifera represents the least(prenominal) evolutionarily modernistic animals of the animal kingdom. Classes: oCalcarea they have spicules of calcium 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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