.... nose. In insects and animals, most sexual and social behavior is controlled by pheromones. Humans have used perfumes for thousands of years, but there is a basic difference between perfume and pheromones. Pheromones are produced by the body and usually do not smell at all pleasant, whereas perfumes are either synthesized or extracted from natural products and are employed because of their pleasant smell. Scientific research suggests that there are human pheromones for both the male and the female. Females have a better developed sense of smell and testing indicates that they are more responsive to male pheromones than the reverse. Research over .....

.... among heterosexual (straight) men or women. In addition, it turned out that rectal sex was a particularly effective way to transmit the disease, and rectal sex is a common practice among gay males. For these reasons, the disease spread in the gay male population of this country immensely more quickly than in other populations. It became to be thought of as a "gay disease". Because the disease is spread primarily by exposure of ones blood to infected blood or semen, I.V. drug addicts who shared needles were soon identified as an affected group. As the AIDS epidemic began to affect increasingly large fractions of those two populations (gay males .....

.... Concrete is a mixture of ingredients that includes cement but contains other ingredients also (Day 6- 7). Portland cement is produced by pulverizing clinker consisting essentially of hydraulic calcium silicates along with some calcium aluminates and calcium aluminoferrites and usually containing one or more forms of calcium sulfate (gypsum) as an interground addition. Materials used in the manufacture of portland cement must contain appropriate proportions of calcium oxide, silica, alumina, and iron oxide components. During manufacture, analyses of all materials are made frequently to ensure a uniformly high quality cement. Select .....

.... able to show a life lesson and reflect what you have learned from your failures prove that you are able to overcome obstacles and learn from your own mistakes. Lastly, he said to be able to describe a situation that you have resolved or fixed within a group. This illustrates your ability to be a team player, which is an important skill to possess in every job. All these three qualities can differentiate who you are, and that is the stepping stone of becoming a part of a company like Apple. Whipfler also gave reasons of why he chose to work for Apple. There are two main reasons why he was so attracted to Apple. First of all, Apple is a multinat .....

.... of being is called inertia. All of a sudden the wind picks up or some kid crashes into the car with a bike. Both the wind and the kid's bike crashing into the bike are unbalanced forces. The car should start to move. The car might accelerate to two miles per hour. Now we would all assume that the car would come to a stop sometime. We assume this because it is true. It is true because there is friction between the tires and the road. The car now has inertia in uniform motion. Since there is friction, the car cannot keep moving forever because friction is an unbalanced force acting upon the tires. What if there was not any friction? The car .....

.... Bang Theory, which will be detailed later. The second is the Steady State Theory. (Weinberg, 1977) The later hypothesis was created to replace the common belief that the universe was completely static. The expansion of the universe was discovered in 1929 when Edwin Hubble discovered that every galaxy in the universe was moving away from each other, this meant that the universe was expanding. Hubble found the movement of the galaxies by using a phenomenon known as the Doppler effect. This effect caused bodies moving away from an observer to have a "red-shifted" spectrum (the light spectrum of the body had been shifted closer to red) and bodies mo .....

.... measures have been implemented due to cost or effects on energy and agriculture. Also, more recently, escaped Atlantic Salmon from aquaculture cages and their offspring are now competing with the native salmon. How depleted are native salmon and Steelhead populations, what has been done so far to boost the populations and has it been effective, and what can be done with dammed river to allow natural breeding? "Salmon Migration: Decisions, Decisions" no author Environmental News Thursday, "Columbia River Salmon Protection OK'd" no author Environmental News Tuesday, June 30, 1999 "Dam Busting Not Always the Best Decision" no author Thursday .....

.... mid 1800’s Mendel bred garden peas to study inheritance. He choose these plants because of their well defined characteristics and the ability to be grown and crossed (Campbell, 1996). Mendel wanted to know the genetic basis for variation among individuals and what accounted for the transmission of traits from generation to generation. Mendel followed traits for the P generation, F1 generation, and F2 generation. The P generation is the original true-breeding parents. Their hybrid offspring is the F1 generation, the first filial. The F2 generation is the second filial and is the self- pollination of the F1 hybrids. It was predominantly his .....

.... idea of evolution. Another theory that is used to explain the origin of life is the big bang theory that states that life was created from a cosmic explosion. Yet another theory on the origination of life is the existence of God and that God created the earth and all of the life on earth. Victor Frankenstein is exactly like the scientists of today. Victor Frankenstein is trying to make a human being from other, deceased human beings, this could be compared to cloning today, making one creature from another. The possibility, or theory of genetic engineering can guarantee that humans would be without deformity, affliction or frailty. Victor Franken .....

.... vegetation. Acidity in water kills virtually all life forms. By the early 1990s tens of thousands of lakes had been destroyed by acid rain. The problem has been most severe in Norway, Sweden, and Canada. The threat posed by acid rain is not limited by geographic boundaries, for prevailing winds carry the pollutants around the globe. For example, much research supports the conclusion that pollution from coal-powered electric generating stations in the midwestern United States is the ultimate cause of the severe acid-rain problem in eastern Canada and the northeastern United States. Nor are the destructive effects of acid rain limited to the natural .....