Embed Take Quizzes › Biology Chapter 4 Test File › Score Report Your Certificate ------------------------------------------------- Top of Form Bottom of Form Print or Download * Facebook * Twitter * Your Result Result » Fail | Your Answers * Print Report Correct | | | Q.1) | What must cells do in order to survive? | | | | A. | obtain and process energy | | B. | convert genetic information into proteins | | C. | keep certain biochemical
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1)medicine of the renaissance epoch : The Renaissance was a great period of intellectual growth and artistic development in Europe. . As part of that scientists and thinkers began to shake loose from the traditional views that governed medicine in both the east and the west. The focus of treatments was no longer a divinely ordained natural balance. Knowledge advanced through the scientific method—conducting experiments‚ collecting observations‚ reaching conclusions. Information was disseminated
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Abstract: There are many different types of cigarettes in the world and although no matter which type is smoked there will be a high carcinogen uptake as well as other chemical resulting in a higher chance of developing cancer and lower cilia beat rates. This experiment took two cigarettes; one with a paper filter‚ and the other with charcoal filter. By taking mollusk gills and placing them in contaminated water from the two different smokes it could be seen that the cilia on the gills had a slower
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Introduction In this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another
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metaphase‚ anaphase and telophase. Interphase The DNA duplicates during interphase to prepare for mitosis. Chromosomes are not clearly discerned in the nucleus. Prophase Chromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes. The nuclear membrane dissolves. Microtubules attach at the kinetochores and the chromosomes begin moving. Metaphase Spindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase
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SCIENTIFIC INVENTION ASSEMBLY LINE: Primitive assembly line production was first used in 1901 by Ran some Eli Olds (1864-1950)‚ an early car-maker (he manufactured the Oldsmobile‚ the first commercially successful American car). Henry Ford (1863-1947) used the first conveyor belt-based assembly-line in his car factory in 1913-14 in Ford’s Highland Park‚ Michigan plant. This type of production greatly reduced the amount of time taken to put each car together (93 minutes for a Model T) from its
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haste than usual. So‚ I will experiment this hypothesis by placing Daphnia under a microscope and recording the heartbeats before pouring the caffeine and after pouring the caffeine. The apparatus used involved culture of Daphnia‚ cotton wool‚ cavity slides‚ dropping pipettes‚ distilled water‚ caffeine‚ beakers‚ stopcock‚ paper towels and a microscope. Before starting the experiment we had to set up the microscope. We then had to catch the Daphnia with a plastic pipette and place them on a cavity
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give an example of each. Micrometer (µm) - Blood cell/amoeba/staphylococcus Nanometer (nm) - AIDS virus/Hep B virus Angstrom (Å) - Amino Acid/ Hydrogen atom 7 What is the history of the Microscope and who helped develop it? Antonie van Leeuwenhoek‚ Dutch Linen Merchant. Started single lens microscope to see the threads better and developed an interest in animalcules in various things. Developed magnification to 300x. 8 What is the scientific method? Hypothesis – deductive approach to
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Gram Characteristics of Bacteria Introduction Bacteria are interesting little critters in that they are not easily visualized without some sort of stain. In classical methodology‚ two different kinds of stains have been used to identify bacteria: acidic and basic dyes. Acidic dyes are so called because they consist of a salt that has a cation that transfers no color‚ but the anion portion is colored and does give off color. Basic dyes consist of an anion that does not give off any color and a cation
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2) . If a typical membrane is 8 nm wide‚ how many such membranes would have to be aligned up to see in a light microscope? How many with an electron microscope? i) Resolution/resolving power of light microscope = 0.2 nM = 200 nM # Membranes need to be aligned to be seen by light microscope = 200 nM/8 nM = 25 membranes ii) Resolution/resolving power of electron microscope = 2 nM Therefore‚ a single membrane will be visible 3) Human ribosomes are roughly spherical and have a diameter
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