.... it occurred. Many theories were developed, but someone always disproved them. Recently with the discovery of genetic mutation and a new understanding of genes and DNA, the evidence supporting evolution has greatly increased. Charles Darwin was one scientist who helped to increase the evidence supporting evolution. Darwin developed the idea of “natural selection� where living things that reproduced in large numbers and survived became dominant and other living things adapted to survive, or they died. Francis Crick, a scientist, co-discovered DNA which opened new doors to the idea of evolutionism (History). DNA is the pattern by which .....

.... by humans. Cloning could give couples who would like children, but could not have any, a chance to have them. This process would also let single women have a child without using in-vitro fertilisation or artificial insemination. Cloning could also make a copy of a deceased child for the parents. Also it would be a very useful tool for historians as people such as Hitler would be able to be recreated and studied to find out what their motivations were. Besides from all these good points cloning also has bad points. The biggest problem with cloning on a large scale is the lack of genetic diversity. If everyone has the same genetic material, .....

.... Santa Fe in 1987. Since then other a-life conferences have taken place, drawing increasingly wider attention and a growing number of participants. Theoretical studies of a-life, however, had been in progress long before the 1980s. Most notably, the Hungarian-born U.S. mathematician John VON NEUMANN, one of the pioneers of computer science, had begun to explore the nature of very basic a-life formats called cellular automata (see AUTOMATA, THEORY OF) in the 1950s. Cellular automata are imaginary mathematical "cells" --analogous to checkerboard squares--that can be made to simulate physical processes by subjecting them to certain simple rules called .....

.... silly results, good for a laugh at the office. Some will produce subtle errors that may be passed on, undetected at the source, in an ever-expanding circle of bad data. And some systems will stop working altogether. How might systems fail? Let's look at an example program in which the omitted century is assumed to be '19' and the program's function is to figure out how old you are. If you were born in 1958, then in 1999 this program will calculate your age as 99 minus 58, or 41. That's fine, but what happens when the century rolls over to '20' in the year 2000? In this program, the year will appear as '00' but the century will still be assumed to be .....

.... in altitude from 16,500 to 45,000 feet. In this division we have the cirrus, cirrocumulus, and cirrostratus clouds. A cirrus cloud appears in delicate, feather-like bands that are not attached to each other, and is usually white with no shading. Cirrocumulus clouds appear like very small round balls or flakes. The cirrocumulus clouds sometimes form a pattern of a buttermilk sky. The cirrostratus clouds sometimes form tangled webs or thin whitish sheets. A large ring or halo is sometimes seen around the sun or moon when the cirrostratus covers the sky. The middle layer of clouds range in altitude from 6,500 to 23,000 feet. The altocumulus, al .....

.... feet) so it would gradually drift upward until they reached the mid-stratosphere.(about 100,000 feet) At this point s would be broken down by short-wavelength ultraviolet radiation from the sun. This radiation is the one which would not reach the lower atmosphere in large amounts because of the ozone layer. When these s do brake down, they released atomic chlorine which then would react with the ozone and convert it back into plain oxygen. The even worse part of all this is that these chlorine molecules do not become inactive after the first reaction with the ozone and would be available to destroy more ozone molecules. Thus this process would be .....

.... and unique way of thinkng of environmental protectionism. McKibben shows us the damage we have done to the natural world and makes a plea for an end. He was born to two journalist parents, married a journalist, and wrote for and edited the The New Yorker . Abbey and McKibben write differently but they are bonded in that they both demand change. Abbey and McKibben would agree that something is wrong with America’s attitude toward the environment. However, Abbey’s writing invites doing battle with those who invade the forests while McKibben simply tries to point out that there is a problem and that something radical must be done to .....

.... is stored in memory. The act of remembering takes place when a correct response is given to a certain stimuli presented. Forgetting is a weakening of this stimulus- response relationship. The Purpose of this experiment is to determine what type of stimulus information is more easily remembered, be it in randomized manner or meaningful. When are more errors made in remembering the stimuli, among these two types of stimuli used (CVC). Also, when a correct response is given, which was the type of stimuli (CVC) that caused this to occur. The design of this experiment on verbal learning has both within- subject and between-subject variables .....

.... risk of being rejected by their foster parents. MASTERS OF DISGUISE Things aren't always as they seem, and nowhere is this more true than in nature, where dozens of animals (and plants) spend their time masquerading as others. So clever are their disguises that you've probably never known you were being fooled by spiders impersonating ants, squirrels that look like shrews, worms copying sea anemones, and roaches imitating ladybugs. There are even animals that look like themselves, which can also be a form of impersonation. The phenomenon of mimicry, as it's called by biologists, was first noted in the mid-1800s by an English naturalist, .....

.... that lie at the basis of the following experiment. Objective: To determine how the presence or absence of water in the environment affects the surface area to volume ratios in plants. It is observed that plants in moist environments have more lush, larger foliage, while plants inhabiting desert conditions are generally smaller and have less photosynthetic surface areas. Hypothesis: Alternative Hypothesis: states the hypothesis being tested in this experiment. Photosynthetic structures of plants adapted to arid environments have a lower surface area to volume ratio than plants adapted to less dry or moist environments. Null hypothesi .....