EXPERIMENT NO-1 AIM- To determine the frequency of A. C. mains by using an electric vibrator. APPARATUS- Electric vibrator‚ table lamp‚ pulley‚ weight box‚ fishing cord‚ a. c. source. THEORY- when a cord of mass per unit length m is connected to the vibrating rod of the vibrator and stretched with a tension T‚ the cord vibrators in segments. If the length of the cord is then adjusted until the nodes are clearly marked‚ the frequency of the stretched string is the same as of the vibrating rod which
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The Effect of Different Molar Mass on the Diffusion on Substances Lunar-maius A. Gaerlan Group 2 Sec. X – 9l August 15‚ 2012 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test. The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue(C16H18N3SCl) were simultaneously introduced to each well. Methylene blue
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Name: Date: 10/14/2013 1. What types of molecules have difficulty crossing the plasma membrane? Explain why. Large polar molecules and
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Diffusion is the molecular net movement from a higher concentration to a lower concentration. For instance‚ when a person is smoking‚ the smoke diffuses into the air. The molecules in the smoke‚ released from the cigarette‚ travel through the air. Here is how it occurs. When molecules are close enough‚ they collide with each other‚ their kinetic energy changes. Due to the direct relationship between diffusion and molecular kinetic energy‚ the molecules move away from the point of the collision as
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Why does exocytosis occur in your body? a. Once a week b. Twice a week c. On Fridays d. All day‚ every day! 8. How do endocytosis and endocytosis differ from diffusion? a. Endocytosis and exocytosis are facilitated diffusion b. They are not similar in any way c. Endocytosis and exocytosis are not facilitated diffusion d. All of the above 9. What does the white blood cell (macrophage) help you with? a. Help you stay awake b. Help your body fight infection c. Help your
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Biological Science‚ 4e (Freeman) Chapter 1 Biology and the Tree of Life 1) Which of the following statements about cells is true? A cell is _____. A) only found in multiples of two‚ because single cells cannot exist independently B) always between 200 and 500 micrometers in diameter C) characteristic of eukaryotic but not prokaryotic organisms D) characteristic of both prokaryotic and eukaryotic organisms Answer: D Reference: Section 1.4 Bloom’s Taxonomy: Level 1 Knowledge 2)
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CELLS All living things are made of cells‚ and cells are the smallest units that can be alive. Life on Earth is classified into five kingdoms‚ and they each have their own characteristic kind of cell. However the biggest division is between the cells of the prokaryote kingdom (the bacteria) and those of the other four kingdoms (animals‚ plants‚ fungi and protoctista)‚ which are all eukaryotic cells. Prokaryotic cells are smaller and simpler than eukaryotic cells‚ and do not have a nucleus. Prokaryote
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environment. It is a movement that restores the environment that humans have damaged. Scientists have addressed the idea‚ in "A life of its own" by Michael Specter‚ of using synthetic biology to mend environmental issues. Synthetic biology combines the "elements of engineering‚ chemistry‚ computer science‚ and molecular biology…to assemble the biological tools necessary to redesign the living world" (Specter 364). There are both positive and negative impacts of a synthetic world on the environment movement
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Theories of Biology University of Phoenix – Axia There are seven major theories of Biology that attempt to organize and make sense of the multitude of ideas surrounding the major theories of Biology. The theories include evolution of natural selection‚ inheritance‚ cells‚ biological classification‚ bioenergetics‚ homeostasis‚ and ecosystems. The evolution of natural selection is the theory the theory that attempts to explain how and why species are able to adapt to their environments
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Biology 101 FINAL EXAMINATION Spring‚ 2013 Name: Gabriel Euzebio Date: May 10‚ 2013 GENERAL INSTRUCTIONS: This final exam is worth 100 points. There are three sections. The Multiple Choice section has 50 questions worth 1 point each‚ for a total of 50 points. The Fill-In The Blanks section has 10 questions worth 1 point each‚ for a total of 10 points. For the Short Answer section‚ you must choose to answer 8 of the 12 questions‚ and each question is worth 5 points‚ for a total
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