.... years away. In addition, the is a relatively young star cluster, with an approximate age of less than one million years. It has even been speculated that some of the younger stars within the cluster are only 300,000 years old. The is an emission nebula because of the O-type and B-type stars contained within it. These high-temperature stars emit ultraviolet (UV) light that ionizes the surrounding hydrogen atoms into protons (H+) and electrons (e-). When the protons and electrons recombine, the electrons enter a higher energy level (n=3). Then, when the electron drops from the n=3 level to the n=2 level, an Hphoton is emitted. 2 This p .....

.... of these plants are much larger that any bryophyte. Seeds evolved between the vascular plants and provided a means to protect young individuals. Flowers, which are the most obvious characteristic of angiosperms, guide the activities of insects and other pollinators so that pollen is dispersed rapidly and precisely from one flower to another of The same species, thus promoting out crossing. Many angiosperms display other modes of pollination, including self-pollination. Evolutionary Origins Plants derived from an aquatic ancestor, but the evolution of their conducting tissues, cuticle, stomata, and seeds has made them progressively less dependent on wat .....

.... u are predetermined at conception to have or not have them. Through your family history and genetics test of amniotic fluid doctors can tell whether an unborn baby has one. These disorders can ranges from slight retardation, to downs syndrome to even a higher risk for heart disease later in life. Chronic and Degenerative Diseases are diseases that go on for a long time or return from time to time over a long period. Usually they can not be cured but many can be helped by medical treatment. Chronic diseases are also degenerative. Such diseases gradually lead to the breakdown of tissues and organs of the body. is a Chronic Degenerative Disease. is the .....

.... genus is Panthera and it's species is Tigris Altaica. The Siberian Tiger is a mobile creature and it lives in northern Asia and is found as for north as the Arctic Circle. It's territory is more than four thousand square miles and it will keep that territory indefinitely, as long as the food supply lasts. The Siberian Tiger hunts very much but only about one tenth of the hunts are successful. It requires more than twenty pounds of meat per day. It is heterotrophic and it's diet consists mainly of deer, boar, bear and fish. The Siberian Tiger is a solitary animal. Males and females are only together during mating season. Females .....

.... forms are planted in the summer for their big flowers and foliage (Canna 1). The use of this plant was natural for people in the south because it was readily available. Being around big happy plants all the time helps people in the south happy by giving them something to take their mind off of life for a while. Garden Geraniums may reach the size of a bush in warm, dry climates (Garden Geranium 1). Again, the bright colored flowers make any bouquet of flowers complete. It is very hard to get any Geraniums to grow in short and cold growing seasons, like in the Pacific Northwest. It was very easy to grow and pick the beautiful flowers in the south. Wis .....

.... land- owners encounter a slob hunter on their lands, they are much less likely to let anyone hunt their land in the future. When a person wishes to hunt on a certain person's land, s/he is often denied the privilege, after the proprietor of the land has had one negative experience with some other hunter. This can make hunting a much harder sport to participate in, even for the people who are hunting for their livelihood. (Satchell 30) Over the years, hunting has reduced the animal population drastically. In the 1970's, the number of ducks making annual flights was approximately 91.5 million. In 1995, the number had been reduced to around 64 million. Within 2 .....

.... from nuclear radiation and to slow the development of nuclear weapons. In 1963, Great Britain, the Soviet Union, and the United States negotiated the first test limitation treaty, the Limited Test Ban Treaty. The TreatyÕs signers agreed not to test nuclear weapons in the atmosphere, in outer space, or underwater. The only testing that was allowed was underground testing. Attempts to control the number of nuclear weapons in the world began about 1970. The Strategic Arms Limitation Talks(SALT) was a convention held by the United States and the Soviet Union to limit the numbers in nuclear weapons. In 1982, the United States and the Soviet Union began t .....

.... when a tiger preys on a zebra the population decreases. The increase of the population of a species is caused by the predator when it stops feeding on a species lower than the predator in the food chain. So when the predator stops or reduces the amount of feeding on a species, the population of the species would start to increase. 3. It is seldom possible to count all the individuals in a given space. Explain one method by which biologists can study population densities without obtaining such data. Scientist barely ever count the amount of individuals in a certain area because it would take too much time. Instead of actually counting the number of individuals .....