Biology Essays and Term Papers

thing is made up of cells. Every cell has a nucleus, and in every nucleus there are chromosomes. In a Human being there are 46 chromosomes, or 23 chromosome pairs. These chromosomes are very long compact coils of D.N.A. (DeoxyriboNuclic Acid). D.N.A…

distinct groups of organisms after a division within a single group or species. They are groups of organisms capable of interbreeding which segregate into two or more populations, which gradually develop barriers to reproduction. These barriers can…

up arteries and causing heart disease, this fatty molecule is an essential part of all cell membranes. Scientists have now found to their surprise that cholesterol may also regulate when and where nerve cells in the brain form the vital junctions known…

wastes are the kidneys. When something goes wrong inside the kidney your body may be in risk of a many very serious problems. Today more than 20 million Americans, one in 9 adults, have chronic kidney disease, more than 20 million others are at increased…

been very important to our understanding of the biological processes that makes life possible. In a world growing more complex daily, laboratory animals are needed more than ever to help in the discovery of vaccines and cures for the plagues of today…

This essay talks about why labortatory animals are needed to help in the discovery of vaccines and cures, easing the burdern of chronic deseases, and ensuring humans a safe food supply. Includes the benefits and contributions animals have in…

are hot moist communities often located close to the equator. Tropical Rainforests receive anywhere from 60 to 160 inches of rain during the year. There warm climate and humid weather house a diverse group of plants and animals. There are over…

CELL DIVISION EDWIN MUJICA LAB SECTION # 18 LAB DAY: FRIDAY JANUARY 13, 1997 …

and differences such that mitosis has four stages and meiosis has eight. Or a similarity where they both have no new gene combination when each of the cells splits after each of their processes. Many more of these similarities and differences…

knowledge about how an organism develops from a single cell and how healthy cells replace damaged cells in adult organisms. Stem cells are one of the most fascinating areas of biology today. But like many expanding fields of scientific inquiry,…