ION OF CLASSIFICATION OF NON-CHORDATES UPTO CLASSES WITH SALIENT FEATURES Vanramliana Pachhunga University College Aizawl‚ Mizoram 1. Phylum Porifera: From the Latin porus for pore and Ferre to bear‚ hence an animal with with pores. ~5000 species. Characteristic features:- a) Multicellular; no true tissue; asymmetric; sessile b) spongin- protein fibers for structure; spicules for skeleton c) filter feeders using collar cells (choanocytes) & amoebocytes
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To investigate the effect of different caffeine concentration on the heartbeat rate of Daphnia at room temperature. Introduction: Caffeine is found‚ and produced in many plant species to function as a natural pesticide‚ and as an inhibitor of seed germination of other nearby coffee seedlings to give it a better chance of survival. Caffeine is able to paralyze and kill certain insects upon feeding on the plants that produce caffeine. Coffee‚ tea and cocoa are common caffeine-containing
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Crayfish – also called crawfish‚ crawdads‚ freshwater lobsters‚ or mudbugs – are freshwater crustaceans resembling small lobsters‚ to which they are related; taxonomically‚ they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom. They are mostly found in brooks and streams where there is fresh water running‚ and which have shelter against predators. Most crayfish cannot tolerate polluted
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Biology 113 Review sheet Chapter 2: * What is a compound and how is it different than an element? Compound is more than one element. An element cannot be broken down by chem. Rxns. * What are the 4 main elements of life? Why? C‚H‚O‚N they make up 96% of living matter and they are found in all of the major macromolecules * Be able to calculate the number of protons‚ neutrons and electrons given an element’s mass number or atomic number. If given this symbol - 4He – can you tell
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Study Companion Unit I Biology 109 Fall 2012 Chapter 27: Bacteria and Archaea Information that you should know‚ and questions that you should be able to address. 1. Define the following terms: positive phototaxis‚ negative phototaxis‚ endospore‚ binary fission‚ phototroph‚ chemotroph‚ autotroph‚ heterotroph‚ obligate aerobe‚ facultative anaerobe‚ obligate anaerobe‚ bioremediation 2. 3. What are the two main branches of prokaryotic evolution? What are the components of a prokaryotic cell wall?
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cadmium‚ chromium‚ barium‚ arsenic and memory. (C. Lo‚ 2013) On the other hand‚ seashells are generally composed of calcium carbonate‚ which is secreted by the outer surface of the mantle of the shell as the creature ages. Seashells are the exoskeletons of mollusks such as snails‚ clams‚ oysters and many others. Such shells have three distinct layers and compost mostly of calcium carbonate with a small quantity of protein—no more than two percent. (F. Horne‚ 2010)
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Chapter 17 Louis Pasteur’s experiment illustrated that: microbes will not grow in a nutrient broth that has been sterilized unless air is allowed to enter the vessel through an opening. Living organisms can spontaneously generate from nonliving matter. True or False? False The scientists usually given credit for disproving the theory of spontaneous generation of bacteria are: Tyndall & Pasteur Miller and Urey’s experiments attempting to recreate the prebiotic environment produced a rich mixture
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is simply the intake of oxygen and the release of carbon dioxide. Further on in this written report will explain how the different animals respire and how the animals use their environment to their advantage. Insects have spiracles on their exoskeletons to allow air (oxygen) to enter the trachea. This is a structural adaptation. The spiracles are located laterally along the thorax and abdomen of most insects and distributed normally one spiracle to one section. In the respiratory system of insects
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effects and develop new methods to constrain it. Following the protocol‚ the proponents were able to conduct three trials of the said protocol. The most effective control method for regulating the anthracnose activity in mangoes is chitosan‚ the exoskeleton of shrimp. The researchers believe this is effective‚ due to the results that state that the experimental setups‚ with chitosan applied‚ did not change‚ which means that chitosan controlled the fungal activity. In the other experimental setups‚
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Diffusion: the movement of fluids from an area of high concentration to a lower concentration Cell theory: -All living things are made up of one or more cells and their product -Cells is the simplest unit that can carry out all processes -All cells come from preexisting cells Prokaryote: no nucleus or other membrane: bound organelles (E-Coli) Eukaryote: has a nucleus and other organelles‚ each surrounded by a thin membrane (Animals/human if multicell‚ amoeba if single cell) Organelles
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