Toward a New Vision: Race‚ Class‚ and Gender as Categories of Analysis By: Patricia Hill Collins Summary- The author writes about oppression in society and how it is full of contradictions. She states that there are no pure victims or oppressors‚ but rather everyone experiences a different amount of penalty and privilege based on their race and social status. She believes that if women and people of colour could find that they have common grounds in regards to class‚ it will eliminate racism
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1. Plant breeders wanted to produce a better variety of tomato by selective breeding. Two plants‚ of the varieties Tangella and Piranto‚ were crossed. (a) Some flowers of each variety were covered with cellophane bags. The diagram shows a covered flower and a brush. (i) Explain why some flowers were covered with cellophane bags during the selective breeding. .......................................................................................................................... ........
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Simple diffusion The term simple diffusion refers to a process whereby a substance passes through a membrane without the aid of an intermediary such as a integral membrane protein. The force that drives the substance from one side of the membrane to the other is the force of diffusion. In order for substances to pass through a cell membrane by simple diffusion it must penetrate the hydrophobic core of the phospholipid bilayer. The types of molecules that can do this are themselves substantially
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Absorption- The process by which the products of digestion are transferred into the body’s internal environment‚ enabling them to reach the cells. adenosine triphosphate (ATP) A common form in which energy is stored in living systems; consists of a nucleotide (with ribose sugar) with three phosphate groups. The energy coin of the cell.aerobic -relating to or denoting exercise that improves or is intended to improve the efficiency of the body’s cardiovascular system in absorbing and transporting
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9 Meiosis CHAPTER OUTLINe Meiosis (p. 172) 9.1 Discovery of Meiosis (p. 172; Figs. 9.1‚ 9.2) A. In 1882‚ Belgian cytologist Pierre-Joseph van Beneden discovered that the gametes of the roundworm Ascaris contained two chromosomes while somatic cells contained four. B. Fertilization 1. van Beneden proposed in 1887 that an egg and sperm could fuse to form a zygote. 2. The fusion of gametes is called fertilization or syngamy. C. Meiosis 1. A reduction division is required to reduce the number
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1. Bedbugs have been evolving in the United States since the 1940s and 50s. (1) Due to genetic mutations after World War II a widespread of pesticides known to be DDT was used. The genetic variation makes them resistant to the pesticides. (2) These DDT pesticides were used on the bedbug population‚ making them resistant to the pesticide. This illustrates natural selection because those resistant with the pesticide survive best. Which is heritable to their population with the resistant pesticide offspring
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Phylum Mollusca Unit 4 Mollusk Introduction Phylum Mollusca Molluscus = soft Soft-bodied animals that usually have an internal or external shell. Includes snails‚ slugs‚ clams‚ squids‚ and octopi. True coelom Complex‚ interrelated organ systems Body Plan The body plan of most mollusks have 4 main parts: foot 2. mantle 3. shell 4. visceral mass 1. Foot: muscular; may be used for crawling‚ burrowing‚ or tentacles for capturing prey Mantle: thin tissue layer
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Midterm Study Guide Answers 1. A hypothesis is an explanation of observations. “If the floor is wet‚ I will slip.” 2. A controlled experiment is when only one variable is changed. 3. If the plant you are experimenting with has a disease that is an unavoidable experimental error. 4. An enzyme speeds up reactions and lowers the energy it takes to produce something‚ a lock and key. 5. Autotrophs make their own food by producing sugars from sunlight and various chemicals. 6
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Andrew Schwartz 1-19-2011 Assignment 1 * Fish- Channel Catfish‚ May 23‚ 1997. It is slender‚ with a deeply forked tail. The young have spots that fade away with age. It feeds on animal and plant material by using it’s whiskers. * Fossil- Crinoid‚ June 16‚ 1989. It is the mineralization of an animal which has a plant-like appearance‚ so it is known as the “sea lily.” * Mineral- Galena‚ July 21‚ 1967. It is the major source of lead ore. It is dark gray in color and breaks into small
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1. Phospholipid: Molecule that forms a double-layered cell membrane; consists of a glycerol‚ a phosphate group; and two fatty acids. 2. Selectively permeable (Semi): Condition or quality of allowing some‚ but not all‚ materials cross a barrier or membrane. 3. Receptor: Protein that detects a signal molecule and performs an action in response. 4. Diffusion: Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration. 5. Osmosis: Diffusion
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