Ap Biology Lab Report

Ps: the iodine was already really dark so it was very hard to see much difference between the control and the others.

The major storage polysaccharide in plants is starch. These molecules would be found in abundance in the stroma in the plant tubers where it is found as granules. Glucose is stored mainly in the form of starch granules, in plastids like chloroplasts and amyloplasts. Plant starch starts out as glucose, but glucose is very hard for plants to store, so it is converted to starch through polymerization. Amyoplasts turn the glucose into starch and move it to the stroma, and in tubers the stroma is a place to store the food (starch), and when plants need the energy in the starch, it converts the starch back into glucose.

I learned that anaerobic is an organism or tissue that is living in the absence of air or oxygen while aerobic is involves the organism or tissue receiving and requiring air. Furthermore I learned about the anaerobic cellular respiration that uses an electron acceptor rather than oxygen to complete metabolism using electron transport-based chemiosmosis. Also in this reading I learned about fermentation which is an anaerobic process in which energy can be released from glucose even though oxygen is not available.

Observation: no bugs were found except small, black, gnats were all close to the ground.

1. Both answers are correct. There are two different models for substrate binding: lock and key or induced fit. In the lock and key model, the active site of unbound enzymes fits perfectly with the complementary shape of its substrate. In the induced fit model, the enzyme changes shape to confirm to the substrate after binding.

1.) My hypothesis that the insects would be most repelled by the lemon plant extract was not supported. Our key findings in the experiment do not support my hypothesis because the lemon had a 60% repulsion response and was the second most repulsive behind orange with a 70% repulsion response. Although the Earthworms were repelled by the lemon plant extract, they were more so repelled by the orange plant extract. 2.)

A half life lab was conducted by rolling pennies in a cup, and then setting aside those which were heads down. This process represents a half-life of the atom, or the time required for half of a substance sample to decay. The purpose of performing this lab was to simulate the transformation of a radioisotope over time, and to graph the data in a way that relates it to radioactive decay and half-lives. The presumed result of this experiment was that a little less than half the pennies would be face down due to some inconsistencies when shaking and pouring the pennies out of the cup.

Atwan and others who trenchantly talked about the position of the internet in al-Qaeda 's progression collects evidence of vast amounts of jihadist online activity to craft their case. Chat rooms, emails and Web sites all bristle with jihadist discussion, dissemination, and debate, providing resources vital to individuals studying al-Qaeda. However, the real centrality of such virtual movement to al-Qaeda and its acts of terrorism remains a relatively unexplored theory in these intellectual accounts of the internets

The test results are as follows: • Cup A decreased in a steady manner, with a weekly average rate of change of .5. • Cub B decreased in a steady manner, with a weekly average rate of change of .5. • Cup C decreased in a steady manner, with a weekly average rate of change of .55. • The weekly rates of change of each cup were all very similar with Cup A and B being the same and Cup C following right behind. • In four weeks, Cup A lost two grams of weight, Cup B lost two grams, and Cup C lost 2.2 grams.

Introduction Isotopes are atoms of the same atomic number having different masses due to different numbers of neutrons. The atomic mass of an element is the weighted average of the masses of the isotopes of that element. The weighted average accounts for both the mass and relative abundance of each isotope as it occurs in nature. The purpose of this lab was to discover the properties of isotopes using types of M&Ms as isotopes of a fictitious element. If the properties of M&M isotopes can be discovered, the the properties of real isotopes can be more easily understood.

Important attributes of medical nuclear isotopes are their small half-lives. A half-life is the time it takes for half of a sample of an isotope to decay. Technetium—99, for example, has a six-hour half-life. Although short, this half-life allows enough time for testing. After this time period, the isotope will lose some of its radiation. The minute half-life allows very little time for any damage

In this report will be show my knowledge about radioactive. Radioactive elements have unstable nuclei. There unstable nuclei give off radiation when the nuclei start to break down(decay). The 3 types of radiation are Alpha, Beta and Gamma. An Alpha particle (α) is a helium nucleus that is a combination of two protons and two neutrons.

The pioneering work of Becquerel in 1896 (the discovery of uranium), and the Curies (who subsequently discovered radium and polonium and the energy and heat given off by these new elements which they called radioactivity) led to the remarkable work of Ernest Rutherford. He was a physicist, whose experiments showed that some heavier elements spontaneously changed or decayed into lighter elements (unstable 'parent' elements giving off protons and neutrons to form a 'daughter' element) through the process of radioactivity. He discovered that radioactive materials decay at a very predictable rate, and that lead was the final decay product of uranium. Using Rutherford's ideas, Bertram Boltwood pioneered a method of radiometric dating in 1907. He hypothesized that since he knew how long it takes uranium to break down, he could measure the proportions of lead in uranium ores, and use his calculations to date how long those ores had existed,

Naturally occurring radionuclides of terrestrial origin have existed in the earth’s crust since its origin. These radionuclides have longer half-lives, for example, K-40 with half-life of 1.248×109 years, U-238 with half-life of 4.468 ×109 years and Th-232 with half-life of 1.405×1010 years. These species have survived since the time of creation and have subsequently decayed to attain a state of stability in which they produce ionizing radiations. The levels of radioactivity on earth vary from place to place. In some places they vary within narrow limits, but in some places deviations from normal levels are wider because of abnormally high levels of radioactivity (Allisy- Roberts, 2005). The distribution of naturally occurring radionuclides

The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226 and more recently defined as: 1 curie = 3.7x1010 radioactive decays per second. In the International System of Units (SI) the curie has been replaced by the Becquerel (Bq), where