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Search results 1381 - 1390 of 1458 matching essays
- 1381: Vertebrate Adaptions For Terrestrial Life
- ... is because the water is needed to dilute the urea (or NH3 if we did excrete it in that form), in order to make it less toxic. Birds excrete ammonia in the form of uric acid, thats what theyre always dropping on our heads. Those mangy little rats with wings
have you ever wondered why we let those little pests run free in the cities, but we wont let ...
- 1382: Turkey Vultures
- ... turkey vulture is a behavior called urohidrosis. Like all birds, the turkey vulture has no sweat glands. To cool itself during hot spells, it frequently defecates on its own legs. The slurry of white uric acid in the feces contains mositure that cools by evaporating. The behavior, shared by other vultures and storks, is more efficient that sweating since it requires no boost in metabolism. The turkey vultures most basic ...
- 1383: DNA: The Thread of Life
- DNA: The Thread of Life The "thread of life", is deoxyribonucleic acid, otherwise known as DNA. It is the spiral shaped molecule found in the nucleus of cells. Scientists have known since 1952 that DNA is the basic substance of heredity. This was hypothesized, and later confirmed ...
- 1384: Introduction To Evolution
- ... traceable as those of large-scale structures such as bones and teeth. The further in the past that some ancestral stock diverged into present-day species, the more evident are the changes in the amino-acid sequences of the proteins of the contemporary species. PLANT EVOLUTION Biologists believe that plants arose from the multicellular green algae (phylum Chlorophyta) that invaded the land about 1.2 billion years ago. Evidence is based ...
- 1385: Properties of Water
- ... the earth's ecosystems in very important ways as well. When water in the earth's saltwater bodies evaporates into the air. This water vapor then cools off, becomes liquid again, and then falls as rain or snow. The salt is left behind, and the resulting precipitation helps replenish the water in lakes, streams, rivers, and the groundwater supply. However, all of this water eventually flows down to the level of ...
- 1386: Recognizing Laboratory Safety
- Recognizing Laboratory Safety Purpose: The purpose of this lab is to stay safe no matter what you're doing in lab. You may be working with dangerous materials such as glass or acid. Procedure: I am following the procedure described in pages 21-24 in the Biology Laboratory Manual. Observations: Does not apply to this lab Answers to Questions: 1. The flask symbol means glassware safety. Glassware can ...
- 1387: Introns and Exons
- ... average mRNA consists of eight to ten introns, some even contain sixteen introns. exons, like introns are also spread apart. Some of their codons may be split by introns, so information for a single amino acid could be some distance apart. Splicing takes place in the nucleus but also could take place in the cytoplasm and the mitochondria. After the splicing of the introns, the G-caps and the Poly A ...
- 1388: Ibuprofen
- ... that I was using. Although this was a crude experiment, I believe that I did gain a lot from it. Introduction The drug that I chose, Ibuprofen, is an anti-inflammatory analgesic. It is propionic acid that is white and powdery, and soluble in water, and organic solvents such as ethanol and acetone. (1) Its structural formula is: (CH3)2CHCH2 CH(CH3)COOH Its role of action as a drug is ...
- 1389: Drugs: Glossary and Definitions
- ... profession. Water: A clear, colorless, odorless and tasteless liquid, H2O that is essential for most plant and animal life and is most widely used of all solvents. Any of the various forms of water, as rain. A bodily fluid, as urine, perspiration or tears. Any of various liquids that contain and somewhat resemble water. Naturally occurring water exerts its solvent effect on most substances it contacts and thus is impure and ...
- 1390: Genetic Engineering
- Genetic Engineering The engineering of deoxyribonucleic acid (DNA) is entirely new, yet genetics, as a field of science, has fascinated mankind for over 2,000 years. Man has always tried to bend nature around his will through selective breeding and other forms ...
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