... 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 in an area they would compare it with other areas where they know the population of individuals. In this way they can roughly estimate the number of indivi ...

... altitude. First, we have the high clouds that range 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 t ...

... door was open and shut, it scraped against an environmental control unit wire. The repeated abrasion had exposed two tiny sections of wire. A spark alone would not cause a fire, but just below the cuts in the cable was a length of aluminum tubing, which took a ninety-degree turn. There were hundreds of these turns in the whole capsule. The aluminum tubing carried a glycol cooling fluid, which is not flammable, but when exposed to air it turns to flammable fumes. The capsule was filled with pure oxygen in an effort to allow the astronauts to work more efficiently. It also turns normally not so flammable items to highly flammable items. Raschel netting that wa ...

... FINCHES .......................................... 37 SPECIATION vs. CONVERGENT EVOLUTION ....................... 39 CONCEPT OF ADAPTATION ..................................... 41 PUNCTUATED EQUILIBRIUM ....................................43 VALUE/LIMITATIONS: THE THEORY OF BIOLOGICAL EVOLUTION .... 45 ALTERNATE EXPLANATIONS OF BEING ........................... 47 CONCLUSIONS ............................................... 48 INTRODUCTION Theories explaining biological evolution have been bandied about since the ancient Greeks, but it was not until the Enlightment of the 18th century that widespread acceptance and development of this theory emerged. In the ...

... research and development budgets. To compensate for this some of the world’s largest companies are working out the details for gigantic megamergers. Some of the recent mergers are an example of the things to come. Two pharmaceutical companies, Sandoz and Ciba-Geigy, merged to create a new company, Novartis. The largest pharmaceutical merger in history, this new company is valued at over $100 billion. A near merger between Glaxo and SmithKline would have created the world’s third largest company, with a budget large enough to fund the estimated cost of sequencing the human genome. Its capitalization would have been larger than the annual gross national product ...

... just think 2,000 paper bags stacked on each other reaches a height of about 7.25 inches, while paper reaches a soaring height of 7.5 feet. This means it takes seven trucks to deliver the same amount of paper as one plastic delivering truck. Talk about a big waste of gas. Plastic bags cost about ¼ of a cent to make, while paper cost close to 3 cents. This is money we save as well as the store owner. This is a lot of money that is going to waste considering that plastic bags are so much more practical then paper. You can use them for lots of other things. You can take on trips to the grocery store, your can protect dry clothing from wet towels in an exercise ...

... deficiencies are those that deal with an individual’s thinking and reasoning process. These abilities are seen in the beginning school years, not at birth, but are the subtle characteristics that only through the school environment can be recognized. In a class environment, the deficiencies of a cocaine child are often confused with those of a disruptive child. The underlying truth is: teachers are not able to cope with them on an individual basis and give them more attention. An initial sign that some children demonstrate is a lack of concentration on virtually every task. Excessive disorganization beyond that of regular children along with being ...

... it complies with the first day of spring. It also means that the sun is an equal distance from the north and south poles. At this time both hemispheres have the same amount of sun as the sun makes its way north. Before the vernal equinox the sun hits the northern surface at an angle instead of hitting it directly. By hitting the earth's surface at an angle there is not as much radiation warming the surface. As the earth rotates and the sun moves further north the temperature increases and the weather turns warmer. During the three months of spring the sun continues to move north and warming the earth more efficiently. At around June 21st the sun is directly ...

... in its dominate generation (sporophyte) develops sporangium on one side of its leaf. When meiosis is finished inside the sporangia and the spores are completed the annulus dries out releasing the spores. The spore germinates and grows into a prothallus which is the gametophyte generation. The antheridia and the archegonia are developed on the bottom of the prothallus. The archegonia are at the notch of the prothallus and the antheridia are located near the tip. Fertilization occurs when outside moisture is present and the sperm from the antheridia swim to the eggs of the archegonia. A zygote is formed on the prothallus and a new sporophyte grows. 4. Flo ...

... the turkey vulture has a large, turkeylike body and sporty red head, it is not even distantly related to the turkey. Instead, turkey vultures- along with their cousins in the United States, the black vulture of the South and East, and the nearly extinct California condor-belong to a group of raptors called New World vultures. Chromosome analysis shows that the New World vultures are actually more closely related to storks than to the vultures of Europe, Asia, and Africa. Turkey vultures are remarkably successful birds. They range everywhere from parts of Canada and much of the United States to South America. At home in deserts, prairies and wood ...