| 2012 | | Toby Rheinberger Lab Partner: Jeremy Saba | [The Effect of surface area to volume ratio and solute concentration on osmosis.] | The aim of this experiment was to test the effect of surface area on osmosis and the effect of solute concentration on osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt solutions‚ then the pieces with the greatest surface area to volume ratio will experience the greatest weight change‚ because more
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diffusion. __The size and the concentration. ___ 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? __ The molecules were to large to go through. My results matched._ 3. Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction? __The albumin was not able to go through and the glucose did. I predicted that neither of them
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2.7.- COMPARACION ENTRE LAS CELULAS Recuerda que las celulas procarionticas son celulas primitovas que no tienen organelos rodeados por membranas. Su material nuclear se encuentra flotando en el citoplasma. Las bacterias se clasifican como procariontas. Las celulas eucariontas son las mas avanzadas y contienen organelos rodeados por membranas. Su material nuclear esta rodeado por una membrane nuclear. Las celulas de las plantas‚ los hongos y los animals son eucarionticas. Las celulas de las plantas
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used for many reasons. Emulsifiers can help to make a food appealing. The example of the mayonnaise without the emulsifier shows how unappealing it would be if the oil and water separated before it was used. Emulsifiers have a big effect on the structure and texture of many foods. They are used to aid in the processing of foods and also to help maintain quality and freshness. In low fat spreads‚ emulsifiers can help to prevent the growth of moulds which would happen if the oil and fat separated.
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Biology Reviewer I. Definition of the cell -Cell is the basic unit/structure of life II. History of cell A. (1665) Robert Hooke- discovered the cell and he established the drawing of a cork cell B. (1674) Anton van Leeuwenhoek- observed red blood cell and myriad in a single cell organism in Pond water -discovered
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cellular organisms includes molds and mushrooms * fungi lack chlorophyll * they are heterotrophic and cell walls contain chitin * more closely related to animals * supergroup Unikonta categorized as opisthokonts bc of single posterior flagellum * heterotrophs‚ secrete enzymes which digest food outside the body‚ the broken down food is then absorbed by hyphae * 3 types of fungi * decomposer fungi‚ absorb nutrients from nonliving sources * parasitic fungi:
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Part II: For the following questions‚ provide your response in short-answer format (2–3 detailed sentences each). Use this Phase’s activities and resources to assist you in answering. 7. What is pH? a. pH is a measurement of hydrogen ion concentration. It measures rather the solution is acid‚ base‚ or neutral. 8. What is a base? a. Accepts hydrogen ions from another substance that have a pH>7. It taste bitter and feel slippery. 9. What is an acid? a. Component with a positive or
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lizard’s body temperature has risen from low 10 to 30 degree Celsius. And so echidna’s body temperature has risen from mid-30 to mid-40 degree Celsius. They are true ectotherms as they could not have maintained that constant internal body temperature. 3. Suggest why there is an advantage to both endotherms and ectotherms in having a warm body temperature (within limits). The warm body temperature will help them maintain their body at a metabolically favourable temperature at which the body enzymes
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Jamaica(see map of Jamaica) on November 2‚ 2011 the weather conditions for the day was fair with a few citrus clouds and strong winds. Three (3) sites were selected to be observed in the lower and middle course of the Swift River. At each site the depositional land form were analysed and identified. Multiple measurements were made and recorded. The three (3) sites that were studied can be identified on a map (topographical sheet‚ scale 1:50) and their sizes were determined using one scale of the
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Chapter 2 Picking a study topic Generalize Social pattern Aggregates Empirically observable (regular senses) 1. Conducting a review of past studies A literature review search plan 2. Focusing on a research question Inductive/deductive 3. The research proposal Which type of research path? What do you examine? Variable (independent/dependent/intervening) What do you examine? Hypothesis‚ null hypothesis‚ alternative hypothesis What type of explanation? Causal explanation: you need
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