Density of a glass

Subject:ScienceGrade:9 Lesson Length: 57minutesDate: November 23rd,2012Content:(topic)-The goal of this lesson is to have students understand concepts of cancer and the different types of asexual reproduction. TeachingStrategy(and/orstrategies):-Direct Instruction-Interactive Instruction-Experiential learning.LearningObjectives:-Students will be able to relay back the concepts of asexual reproduction.-Students will be able to write down definitions for the types of asexual reproduction. -Students will be able to identify some changes that could be made for the better in our world.Pre-requisiteLearning:-Knowledge of cells from last day.Assessment:-Visual.Looking at students’ notebooks in answering the questionsPresentation:Set: (estimated time 2minutes)-Greet students. Development: (estimated time 50-55minutes)Input (oral instruction)-Do attendance. Catch up with students who are late. -Rememberthat website I told you guys about? Here it is!-http://54.243.178.219/(Skin Deep Cosmetics Database –Environmental Working Group)-Chapter 1.2 -Asexual Reproduction–is reproduction that involves only one parent. Offspring are clones.
-Types of Asexual ReproductionoBinary fission–when single-celled organisms, such as bacteria, amoebas, and some algae, divide into two identical daughter cells to produce two new individuals that are identical to each other and are clones of the parent cell. oBudding–parent produces a small bud or miniaturized clone (i.e. –yeast). Buds eventually detach and become separate individuals. In other animals, they don’t detach and you get a large structure composed of many identical individuals. o(Start Here) Parthenogenesis–is the process by which unfertilized, haploid eggs mature into new organisms. Used by ants, bees, certain species of snakes and lizards. In bees, unfertilized eggs become male drones, whereas fertilized eggs become female workers and queens. oSpores–Haploid cells that can develop into new organisms. Spores are not sex cells but simply haploid reproductive cells. They cannot be fertilized to produce offspring. Protect the DNA of the organism against unfavourable environmental conditions. (e.g. –Fungi, green algae, some moulds, non-flowering plants like ferns.) Black mould is formed by spores and black mould is toxic when inhaled. oVegetative Reproduction–asexual production of identical offspring, or clones, from the parent plant. No seed is formed. (i.e. –potatoes. On the farm, that’s how we planted our potatoes, was from taking older ones that were growing eyes and those creepy white prongs, cutting them in pieces, and simply putting them in the ground to grow). oFragmentation–New individuals are formed from a piece of the existing parent organism. Worms, for example, can grow into two identical individuals after being cut in half. Starfish can do it too. Some organisms also have the ability to regrow limbs and parts of their body. Anyone watch “The Amazing Spider-man”? Dr. Conners is fascinated with how lizards were able to regenerate their tails or limbs after they’d been severed so he seeks to try and make this process available to humans. The process turns him into a raging lizard though so the moral of the story is, don’t try to be a lizard. oGrafting–Is a process in which a part of one plant is joined with another plant. The plants heal together and grow as a single plant but end up maintaining their own characteristics. Mainly used for making gardens look pretty or for orchards. oPlant Tissue Cultures–Plant cells placed in a petri dish containing the necessities of growth so that they can grow until they can be transplanted to soil and grown like a normal plant. Kind of similar to the concept of “invitro-fertilization”, which we’ll get into later. This is fascinating because scientists will use an almost similar process when trying to construct genetically modified organisms (ever heard of a grapple?). What will occur is that scientists will attempt to almost force the DNA of two different organisms together in the hopes that they mesh and create something new. They’re almost forcing an asexual organism to be sexual until it can produce the combination of the two organism’s DNA on its own. They quite literally shoot pieces of DNA with a .22 calibre charge that fires a metal particle coated with DNA into plant tissue.-Have students do questions 1, 2, 6, and 7. They should use their daily notebooks to do so. -Sexual reproductionin plants and animals is the union of two sex cells, also called gametes, to produce a new individual. -Gametes–a sex cell. They are haploid. -Most animals and flowering plants reproduce sexually. Mix of traits from both parents