Planarians A planarian is a small free-living flatworm. These flat worms are usually found under rocks in fresh water. They are part of the phylum Platyhelminthes and in the class Turbellaria. Planarians are usually zoophagous‚ they feed on small living invertebrates and decaying organisms found in their community. Some planarians could eat segmented worms‚ leeches‚ snails‚ and other small herbivores. Planarians may also be organisms that gain their food energy with the help of decomposing
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Planaria Regeneration in Ideal Temperatures vs. Cold Temperatures Christina Malfas Abstract Planaria are flatworms that live in quiet freshwater bodies. They live in a narrow range of temperatures‚ from 22-24°C. They regenerate asexually‚ specifically through a process called epimorphosis‚ in which they completely regenerate one half of their bodies after splitting themselves in two. The diffusion gradient model assumes that cells in an organism “know” their orientation on that organism due
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This report will present the regenerating planarian. Planarians are tiny flatworms that live in freshwater. Planum means flat‚ which is how they got their name planarians. These teeny worms are generally hard to find considering how small they are. In fact‚ these creatures range from the size of 3 to 12 millimeters. Planarians are categorized as scavengers‚ they eat the decaying parts of dead animals. They have a tub where they are able to capture food and eat‚ which is called a pharynx. The Planarians
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*Commensalism is a class of relationship between two organisms where one organism benefits but the other is neutral‚ there is no harm or benefit. An example of commensalism is a flatworm attaching to the horsecrab and eating the crab’s food while the crab is not affected. Commensalism *Parasitism is a type of symbiotic relationship
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1. If a mollusk moves by a broad muscular foot‚ it is probably a) a bivalve b) a gastropod c) two-shelled d) a cephalopod 2. A herbivorous mollusk scrapes algae from rocks and twigs with its a) radula b) poison glands c) foot d) feathery gills 3. The cephalopod that has lost its shell completely is the a) octopus b) slug c) cuttlefish d) nautilus e. squid 4. The blood of annelids typically flows a) only in dorsal vessels c. only in ventral vessels b) in a closed circulatory
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Rags transformed into gowns‚ pumpkins into carriages‚ and mice into chauffeurs—people often associate magic with impossible grandeur and grand impossibilities. They associate it with fantasy. But magic lingers. It hides in the unexpected: in my phone that never breaks (despite being run over‚ submerged‚ and frozen)‚ in my friend’s dog that always manages to raid the refrigerator‚ and in my uncle who always parallel parks in two moves. People who don’t believe in magic have yet to encounter it. They
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Animals do not have cell walls‚ but do generally are multicellular‚ reproduce sexually and have gap junctions. Animals are ingesting heterotrophs; fungi have absorptive nutrition. Development order: fertilization‚ cleavages‚ blastula‚ gastrula and metamorphosis. Ancestor of animals: protozoa (choanoflagelate) Know Animal Taxonomy including Lophotrocozoa!!!! Only animals have hox genes Sponge=perifera=parazoa=lacks true tissue Eumetazoa=everything besides sponge Cephalization=sensory organs
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Parasites are organisms that live in another organism. They can cause infections and diseases. There are several group of parasites. People ask themselves questions are parasites dangerous or can they cause damage? The movie “Parasites: Eating us alive” answers and explains those questions. Some parasites can cause damage and may be very harmful. In 1993‚ a parasite called cryptosporidium spread through the state of Milwaukee. Unfortunately‚ some people of Milwaukee contracted this parasite through
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countless forms. An estimated 97 percent of all species are alive today are invertebrates. Invertebrates are united more by what they lack (a backbone) than by shared characteristics. Invertebrates include animal groups such as sponges‚ cnidarians‚ flatworms‚ molluscs‚ arthropods‚ insects‚ segmented worms‚ and echinoderms as well as many other lesser-known groups of animals. Scientists are still uncertain exactly how the first invertebrates evolved. Most experts agree that the first invertebrates evolved
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Online sources about homonyms‚ heteronyms‚ homographs: ➢ HOMONYMS are words that sound alike but have different meanings. o Homophones are a type of homonym that also sound alike and have different meanings‚ but have different spellings. ➢ HOMOGRAPHS are words that are spelled the same but have different meanings. o Heteronyms are a type of homograph that are also spelled the same and have different meanings‚ but sound different. ➢ WORDS THAT BOTH SOUND THE SAME AND ARE
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