Animal testing has been an issue since the 19th century‚ it all started in the United Kingdom with a French chemist named Louis Pasteur. Even though animal testing has a lot of pros and cons it is very cruel and inhumane. Right now many animals are locked inside cages in laboratories sitting lonely and fearing that they would be chosen to practice an experiment on them. They are forced to inhale cigarettes and they can’t spit it out because their mouth is locked up and they have no movement. They
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Planning Exercise Aim To investigate the effect of phosphate on cell division in root tips. Background knowledge Phosphate ions (macronutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide‚ mitosis has to occur. Phosphate is needed for production of ATP which provides energy for mitosis to occur. DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base‚ pentose sugar and phosphate group
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small piece of cardboard electrical or masking tape. 1 teaspoon Epsom Salt Petri dish A glass 1 tablespoon red cabbage juice Procedure: 1. Remove the erasers and their metal sleeves from both pencils‚ and sharpen both ends of both pencils. 2. Fill the glass with warm water and add 1 teaspoon of Epsom salt and 1 tablespoon of red cabbage juice. 3. Stir the mixture thoroughly. 4. Pour some of the water mixture into the petri dish until it is ¾ of the way full. 5. Attach wires to the electrodes on the
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growth was measured by filtering the contents using Whatman Filter paper No.1 from each of the flasks. The filter paper was washed with deionized water and then dried at 750C in a hot air oven till completely dried and was weighed in a pre-weighed Petri dish to obtain the residual fungal mass. The lowest concentration at which the fungal mycelium growth inhibited was chosen as the MIC of deltamethrin (Abraham and Silambarasan‚
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What are the three mechanisms by which disinfectants work? Describe. The three mechanisms by which disinfectants work are crosslinking‚ coagulating‚ clumping; structure and function disrupture; oxidiaing Crosslinking‚ coagulating and clumping - Like many disinfectants alcohols are generally considered to be non-specific antimicrobials because of their mant toxic effects.Alcohols cause all proteins to clump and lose funcion. The alcohol must be diluted with water fir the greatest effect because proteins
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42-0063-00-01 LAB REPORT PHOTOS – Include these digital photo with your lab report‚ either as a separate attachment to an e-mail or paste into your document. 1. Photo #1 –Take a photo of the seedlings AFTER they have sprouted – close enough to the petri dish to see the little seedlings‚ even if they are not clear enough to count in the photo. Exercise 1: observing a Monohybrid Cross Data Table 1: Punnett square Father ( g g ) × Mother ( g g ) Father (♂) gametes g g Mother (♀) Data
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Arianna Montoya Osmosis and Diffusion Lab Report Background Information: Diffusion involves the movement of solute particles across a selectively permeable membrane from higher to lower concentrations. A selectively permeable membrane allows only some thing to go through. Water and oxygen are examples of molecules that are able to go through the membrane
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Making a plastic from potato starch – extracting starch In this activity you are going to extract starch from potatoes. This starch can be used to make a plastic. A similar process is used in industry to extract starch‚ which is then used in a number of products‚ including food and packaging. You will need: q q q q q q Approx 100 g clean (not muddy) potatoes Grater Tea strainer Distilled water Pestle and mortar 100 cm3 measuring cylinder. What to do q q q q q Grate about 100
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Fruit Fly Genetics Lab Kelly Hernandez 5/31/14 Drosophila melanogaster is a small‚ common fly found near unripe and rotted fruit. It has been in use for over a century to study genetics. Thomas Hunt Morgan was the best biologist studying Drosophila early in the 1900’s. Morgan was the first to discover sex-linkage and genetic recombination‚ which placed the small fly in the forefront of genetic research. Scientists have used Drosophila for many reasons. For one they are very easy to maintain‚
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Introduction The annelids (also called "ringed worms")‚ formally called Annelida (from Latin anellus "little ring")‚ are a large phylum of segmented worms‚ with over 2‚000 modern species including ragworms‚ earthworms and leeches. Annelids are abundance in freshwater‚ brackish and marine sediments. They are bilaterally symmetrical‚ triploblastic‚ coelomate organisms. These invertebrates can be recognized by their segmented bodies. Segments each contain elements of such body systems as circulatory
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