basic way: Body fluid is filtered by a special organ. Selectively permeable membranes remove urea or uric acid. Osmolarity is controlled by selective reabsorption/secretion. C 5 types of excretory systems: None in porifera‚ cnidaria Protonephridia in planaria & rotifers Metanephridia in annelids Malpighian tubules in terrestrial arthropods Kidneys (with nephrons) in vertebrates Protonephridia Have flame bulbs‚ tubules‚ and nephridopores. C Flame bulbs selectively filter body fluid to nitrogenous waste
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The classification of animals The Classification of animals : Animal Kingdom can be split up into main groups‚ vertebrates (with a backbone) and invertebrates (without a backbone). When you think of an animal‚ you usually think of something like a cat‚ a dog‚ a mouse‚ or a tiger. All told‚ around 800‚000 species have been identified in the Animal Kingdom -- most of them in the Arthropod phylum. In fact‚ some scientists believe that if we were to identify all species in the tropical rain forests
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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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AndrewGuerrero BIO 125 Lab Due November 14‚ 2012 Practical Exam 1. a. The symbionts (Paramecium) of the termite belong to the kingdom Protista b. Paramecium living in the intestines of termites breaks down the cellulose walls of wood fibers releasing proteins that are absorbed by the termites’ digestive system. Paramecium benefit by having an environment to thrive and they ingest the wood fibers for their own nutrition as well. 2. c. An important ecological effect
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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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