04.Brandan+Chaplin

7/2/12

Robert Hooke and Robert Brown
 * Who were they?
 * What was their job?
 * What did they contribute to cell theory?
 * Why was their contribution so important?

Robert Hooke


 * Born on the 18th of July in Freshwater, Isle of Wight. Died on the 3rd of March 1703 aged 67.
 * Hooke attended at Oxford University.
 * Hooke was a microbiology, genetics, physics and chemistry.
 * Robert Hooke put slices of cork under his microscope and discovered that it is filled with air. He saw that the air is perfectly enclosed in cells.
 * This was important because it lead to other scientist learning about cells in other living organisms.

Robert Brown


 * Born on the 21st of December 1773 in Montrose Scottlandand died on the 10th of June 1858 aged 84.
 * Brown attended Marschal College but withdrew in his 4th year then attended the University of Edinburgh.
 * Browns was a Botonist.
 * Robert Brown was the first to notice all plants contain a nucleus.

19/3/12



A cow (herbivore) has 4 chambers in the ruminant. the ruminent digest celluloce in the stomachs 4 stages.Both the dog and cow have a caceum but the dog hardly ever uses it. the cow has a larger set of molars and premolars which grinds the food down to get more nutrients out. the dog (carnivor) has two chambers and the dogs teeth are all incisors to cut and rip apart food. the dogs intestines are smaller then the cows as the dog doesnt need to digest celluloce. the cows intestins can digest nutrients and minerals where as the dogs is just for digesting food.

2/4/12

radioisotopes are used to provide diagnostic information on the function on someones specific organs or to treat it. about 90% of procedures are for diagnosis. iodine : provide diagnostic information. carbon: dating prehistoric findings. radium: treating cancer. small gold tubes containing radium are inserted into the affected tissue. Over time, these tubes leak little amounts of radiation that poison the cancer-stricken areas of the body, after which the tubes are then removed from the patient. Positves: Provide diagnostic information about the functioning of a person's specific organs, or to treat them. Treat some medical conditions, especially cancer, using radiation to weaken or destroy particular targeted cells. Disadvantages: Shown to cause cancer and birth defects. Radioisotopes can expose workers to radiation. This can damage their healthy cells. The disposal of radioisotopes can cause pollution problems. This causes damage to the environment.
 * // 1. What are radioisotopes used for in medicine? //
 * // 2. Provide 3 examples of a radioisotope and list where it is used. //
 * // 3. Choose one of your examples and describe the process. //
 * // 4. List the pros and cons of using radioisotopes in medicine. //

8/5/12

//Gambusia affinis//
 * **__What is its scientific name?__**


 * **__Provide a diagram of the mosquito fish.__**

Eastern Gambusia were introduced to Australia in 1925 as a biological control agent for mosquitoes. Up until 1982 the World Health Organisation recommended their use for malaria control programs.
 * **__Why was the mosquito fish introduced?__**

mosquito fish have adapted to stay in waters that have low oxygen, lots of salinities and have learnt to tolerate different water temperatuers but prefer to stay in tempertures between 25 degrees and 38 degrees celcius. mosquito fish can also survive in temperatures up to 44 degrees celcius and can also live in icy conditions. the fish can also survive in waters that are polluted by organic waste, heavy metals, insecticides, herbicides, rotenone, phenol and radiation.
 * **__What are some of its adaptations.__**

mosquito fish when living in water that is low in oxygen can get oxygen by rising to the surface and gulping air. these fish can survive in any temperature so if the environment in which the the fish is living in has a temperature change the mosquito fish is able to survive unlike other fish which will die due to the change. this fish can also survive in polluted areas. so if the council decides to dump rubish in a group of mosquito fishses habitat they will still survive.
 * **__For each adaptation, explain how it improves the mosquito fishes chance of survival?__**

Wild mosquitofish are found in every state and territory except the Northern Territory. They are found in swamps, lakes, billabongs, thermal springs, salt lakes, and ornamental ponds. Mosquitofish are considered a noxious pest, especially in New South Wales and Queensland, and it is illegal to release them into the wild or transport them live into any of the states or territories.Because of their aggressive nature and high birthrate, mosquitofish can overtake most native species in an area, drastically harming local populations. Mosquitofish have harmed native fish populations in many ways. By consuming algae-eating zooplankton, they increase the chances of algae blooms in the water, reducing the water quality. They are very aggressive, and tend to attack other fish and nip their fins, leading to infection or death.
 * **__What has this done to the ecosystem and how has this influenced the distribution and abundance of mosquito fish?__**