550 years ago. Platyhelminthes otherwise known as “flatworms” have a wide variety of species within the phylum and have positive and negative effects on those who interact with them. Some examples of Platyhelminthes include Tapeworms‚ Flukes and Planaria. The unifying characteristics of the flatworm include that they are mostly parasitic‚ have bilateral symmetry‚ their nervous system includes a brain (cephalization) and they lack a cavity between the body wall and digestive tract. The key structural
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1 Class X: Biology Chapter 8: How Do Organisms Reproduce? Key Learnings 1) Reproduction is the biological process by which new individuals of the same kind are produced. 2) Reproduction is not essential for the survival of an organism‚ but is vital for the survival of a species. 3) Reproduction produces identical copies of the body design. 4) DNA is the informational macromolecule of our body. It provides information for protein synthesis. 5) During cellular reproduction‚ DNA duplication occurs
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Samantha Rogers & Sarah Grill July 6‚ 2015 Stem Cell Biology and Regenerative Medicine Analyzing the Effects of PZQ on Planarian Head Regeneration Abstract This paper focuses on the question of whether or not the drug PZQ (Praziquantel) has an effect on the double-headed formation of planarians. As the rest of the report will describe in more detail‚ we used multiple concentrations of PZQ reconstituted in 95% ethanol to observe its effects on planarians cut in a shape that promoted double headed
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CHAPTER NO-5 KINGDOM ANIMALIA Phylum Porifera (GK: Porous = Pores + Ferro = form) Main characters: 1. They are commonly called as sponges. 2. They are sessile animals. 3. Sponges range in height from about 1cm to 2cm. 4. More than 5000 species of sponges are found. 5. All are marine‚ while some are fresh water. 6. The central body cavity is called spongocoel. 7. A single large opening is called as osculum. 8. They are filter feeders. 9. Body lining is formed by flagellated cells
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Diversity in Living Organisms (Science) |Close X | |[pic] Classification And Evolution Classification refers to the identification‚ naming‚ and grouping of organisms into a formal system based on similarities in their internal and external structure or evolutionary history. It determines the methods of organizing diversity of life on earth. Therefore‚ classification helps in understanding millions of life forms in detail. Who started the classification of organisms? Let us explore the history of
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I. Platyhelmithes Kayla Smith A. Structure and Function of Flatworms Period 2 1. Flatworms are the simplest animals with bilateral symmetry. 2. The tissues in bilaterally symmetrical animals develop from three germ layers: Ectoderm‚ Mesoderm‚ and Endoderm. 3. In flatworms‚ the layers are pressed against one another to form a solid body. 4. Because flatworms do not have a hollow body cavity between the endoderm and mesoderm‚ they
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[Exp] 141. The effects of ultrasonic on bacteria count [Exp] 142. The effects of antibiotics on bacteria count [Exp] 143. The effects of temperature changes on bacteria count coming soon* 151. Microbial antagonism coming soon* 161. Reaction of planaria to pH‚ light and temperature conditions [Exp] 162. Reaction of paramecia to pH‚ light and temperature conditions [Exp] 171. Plant tropisms and growth hormones [Exp*] 181. Transpiration rates for different plants and conditions [Exp] 191. Sugar
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* Are made of animal cells * No cell walls * Eukaryotic. Lysosomes‚ centrioles. Flagella‚ cilia * Multicellular * Heterotrophic * Chemotrophic * They are either: 1. Invertebrates * Have no back bone 2. Vertebrates Things to classify Animals: 1. Feeding 2. Respiration 3. Internal Transport 4. Excretion 5. Response 6. Movement 7. Reproduction Phylum Porifera * The flagella move water into the sponge * Cells collect
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AP Biology‚ Chapter 33 Invertebrates [by clade] SUMMARY INTRODUCTION PARAZOA Introduction Phylum Porifera: Sponges are sessile with porous bodies and choanocytes 1. Identify the parts of a sponge (including the spongocoel‚ porocyte‚ epidermis‚ choanocyte‚ mesohyl‚ amoebocyte‚ osculum‚ and spicule) and describe the function of each. a. Lifestyle: sessile‚ immobile filter feeders b. Water circulation i. Epidermis seals outside ii. Flagellated choanocytes lining
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CHAPTER 4 ANIMAL KINGDOM Animal Kingdom is characterized by multicellular‚ eukaryotic organisms. The cells lack cell walls. They ingest and digest food (holozoic)‚ hence they are heterotrophic. Higher forms show elaborate sensory and neuromotor systems. Majority of them are motile. Reproduction is mostly sexual and embryological development is present in them. About 1.2 million species of animals are described till now. The classification helps to assign a systematic position to newly described
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