Aneka Khilnani September 8. 2012 Period 3 AP Biology Free Response Essay: Cell Size Life is defined as a distinctive characteristic that a living organism‚ dead organism or non-living thing‚ and it has the ability to grow‚ metabolize‚ respond to stimuli‚ adapt and reproduce. Cells are not smaller that 0.1 um because within the cell all the necessary components have to take place‚ cellular metabolism‚ reproduction‚ photosynthesis and there has to be a sufficient amount of space for that to
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Cell Size Control David A Guertin‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA David M Sabatini‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA Growth in biological systems is defined as the accumulation of mass‚ which leads to an increase in size. In this article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article
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One day when I was in the fourth grade‚ we had just finished a free response test on a story we were supposed to read last night. The next day‚ my teacher had completed grading all the test and he had noticed that two of the papers had were the exact same‚ their names were Danny and Ishmael. But Danny was absent today so the teacher called Ishmael to the front of the classroom and asked him if he and Danny cheated off of each other’s test. Ishmael first lied and said‚ “I don’t know how we have the
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Maximum Cell Size & Diffusion – Ferris Shaw Research Question: How does the surface area to volume ratio affect the diffusion rate in agar cubes? Hypothesis: The rate of diffusion in directly related to the surface area to volume ratio of cells and is responsible for the efficiency of absorbing nutrients‚ oxygen‚ minerals etc. in the cell. This ratio is specific to cells as they require a ratio that isn’t big enough to take too long to receive the nutrients and oxygen or too small to
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Free Response When the dog first barks it creates sound waves that travel through the air‚ spreading out and dissipating as they go‚ until they reach the ear of the musician. When the sound waves reach the musician they are “gathered up” into the ear by the oracle and travel into the middle ear. Once in the middle ear the sound waves vibrate the ear drum which transfers the vibrations to the hammer. The hammer then moves the vibrations on to the anvil which transfers them to the stirrup.
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AP US Government Free Response Questions 1.) Three types of powers that were designed to different levels of government in The Constitution are enumerated powers‚ implied powers‚ and reserved powers. Enumerated powers are powers specifically delegated to the congress by the US Constitution. They are listed in Article 1‚ Section 8. These powers affect the distribution of powers between state and national governments because enumerated powers are strictly given to congress/National government
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used every tool available to free men to save Tom Robinson‚ but in the secret courts of men’s hearts Atticus had no case. Tom was a dead man the minute Mayella Ewell opened her mouth and screamed” (Lee 323). This clearly shows that despite Tom’s innocence and Atticus’ ability to defend him‚ Tom Robinson never would have had an opportunity of winning the court case because of his estrangement. The beliefs and opinions of this time period allowed a guilty man to be let free and an innocent man be convicted
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Compare the size of cheek cell and onion cell DCP: Introduction: In this experiment‚ Onion cells (Allium cepa) Cheek cells (Homo sapiens) were measured and compared. The aim of this experiment is to find out how both cells differ by comparing their size. Onion cells (Allium cepa) is plant cell and Cheek cells (Homo sapiens) is an animal cell. Hypothesis: The size of an animal cell (Homo sapiens) should be smaller than a plant cell (Allium cepa). Because a plant cell has cell wall which
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Introduction There are many ways cells dispose of toxic molecules in order to maintain the necessary internal environmental conditions to survive. These toxic molecules are known as free radicals that contain an unpaired electron on the outer orbit (Proljsak et al.2013). Some examples of free radicals that can be found in the cell are superoxide (O2-)‚ hydrogen peroxide (H2O2) and even reactive metals like copper and iron. These free radicals are produced based on the environment the individuals
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geography of automobile factory construction shown by the maps. 1. International-based change in the geography of plant construction a. Increase in the number/investment of foreign-owned automobile plants OR b. Increase in both small and especially larger-size‚ foreign-owned automobile plants Note: Students cannot earn 2 points for listing two international-based changes. 2. Domestic-based change in the geography of plant construction a. Increase in the number/investment of automobile plants in the South
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