Location 1 was above the high tide mark, Location 2 the tidal rock pools and location 3 the low tide mark. Many different creatures were identified in each of the areas. One of the organisms that was identified during the investigation was Tessetoporas Roseas (Barnacles). There were zero barnacles found in location 1 and 2 and 557 barnacles found in location 3 per 0.5m2. Location 3 (low tide mark) has many biotic pressures such as wave action, fluctuations in water temperature and predators.
One important discovery Shubin made is Tiktaalik, which is a 375 million year old fossil. Tiktaalik is a fish that has scales and gills, but its head is flattened like that of a crocodile. Like most fish, Tiktaalik’s fins have ray bones enabling them to paddle in water, but the most amazing thing about it is that it has interior bones which allows it to lift off of the sea floor, something unordinary for a typical fish. It would use its limbs for support like a tetrapod. Shubin shows how fin structures of fish like Tiktaalik mark the beginning of the evolution into the mammalian paw and opposable thumb structures in the hands of today’s primates.
Introduction: Sow Bugs, small land crustaceans, have oval bodies with armor like plating, live in humid and cool environments such as logs and leaf litter, and are chosen to be used to test for taxis, movement towards or away from a stimulus. Both chemotaxis, movement in response to chemicals, and phototaxis, movement in response to light, are tested in this experimental procedure. The purpose of this experiment is to test the response of Sow Bugs to a light and a chemical source, showing whether they exhibit taxis to a certain stimulus. Body spray was used because it exhibited all the attributes of a potential chemical substance. It has color and smell and being in a liquid and a gas form.
This tactic was used, for example, at battles such as the Battle of Verdun and the Battle of the Somme in 1916, and the Battle of Passchendaele in 1917. This tactic, however, tended to result in huge casualty rates and neither side made significant gains. New weapons were also used in an attempt to break the stalemate on the Western Front. At first, artillery barrage was used to inflict constant barrage on the enemy and preceding front offensives. As the war drew on, other weapons such as gas and tanks were used by the Germans for the first time at the First Battle of Ypres in 1915, and became a major tool of warfare on the Western Front.
Therefore the Megladon fish is a laterally compressed fish which allows it to live in dense covers or coral reefs. Laterally compressed fish make the fish flattened side-to-side. The coral reefs of Jamaica are vibrant and full of fish. The Megladon's body shape is efficient enough to allow burst of speed, escape from predators as well as fit into small spaces. They have two pectoral fins that are forked in on the sides which enable them to control their direction of movement.
This backs up information we already know in that the British army learnt from its defeats at the very start of the war, for example the battle of Mons. It can be argued however that source 7 is written by a Captain within the British army, which provides the possibility of a more favourable account of the advances. This can be countered though, as Kelly was indeed a primary source. This shows that both sources 7 and 8 agree to a fair extent that ‘The Great War resulted in a revolution in the art of warfare for the British army’. In source 9, we see John Laffin, a British historian state: “The British army was not most advanced and eager in new tactical ideas” this shows that the theory of the officers can be seen to be correct, in that at the
He became famous for tests he conducted that resulted in adoption of the AS caliber as the official U.S. Army handgun. In November 1914 he retired from the service with the intention of devoting his full time to perfecting an automatic rifle. When the United States entered World War I, he was
History 9 9 March 2012 How assault rifles changed WWII The technological advancement that had a large impact on WWII was the assault rifle. Changing the way soldiers have to deal with combat by changing them into all purpose weapons instead of making them strictly short or long range weapons. They where developed by the German army in the second half of WWII. Since soldiers are used to close combat this changed it by having a weapon that is balanced between the two ranges known as the assault rifle. In previous years the main rifle you used as a soldier was known as the bolt-action rifle.
Examples include a tiger's stripes and Page 3 of 12 the battledress of a modern soldier. Camouflage is a form of deception. The word camouflage comes from the French word 'camoufler' meaning 'to disguise'. Natural camouflage : In nature, there is a strong evolutionary pressure for animals to blend into their environment or conceal their shape; for prey animals to avoid predators and for predators to be able to sneak up on prey. Natural camouflage is one method that
Without this device, the identification of toolmarks and firearms would be such a cumbersome process that it would be carried out on a very limited basis. (Lerner, 2005,World of Forensic Science, Encyclopedias) History Chemist Philip O. Gravelle and American Army Colonel Calvin Goddard were the pioneers who invented the comparison microscope in 1921. At that time the comparison microscope was used to compare fired bullets and casings because of the unique impression left on the fired bullets or cartridge case. Calvin Goddard Calvin Goddard perfected the comparison microscope and subsequently popularized its use. Comparison microscope was first introduced to the European scientists for firearms identification and other forensic uses by Sir Sydney Smith (Thorwald ,1964,wiki,) In the late 1920s, Swedish criminalist Harry Söderman drastically improved the comparison microscope by inventing a system for rotating the bullets under the objectives.