Clearly selection pressure will not result in organisms that are better equipped to avoid agents of mass extinction such as the major asteroid impact at the end of the Cretaceous. Yet there is increasing evidence that mass extinctions are selective even though they follow different rules to “background” extinction. What […]

Written Assignment: Informational Booklet weigh and make health-related decisions based on an understanding of the value and limits of scientific knowledge and the scientific method Choose and research a topic related to human biology. Imagine that you are creating a small booklet that will become available at a local health […]

What are the water cycles in biology? It is important for you to have already studied the zoology and physiology sections of this site, since those sections contain basic knowledge required for a better understanding of embryology. Discover the beauty and mystery underlying all of embryology. It is really fascinating […]

1)      Eosin Methylene Blue (EMB) agar contains the dyes eosin and methylene blue, which inhibit the growth of gram-positive bacteria and therefore select for gram-negative bacteria. These bacteria take up the EMB dye, giving large colonies a dark blue appearance and smaller colonies a green , shiny appearance. 2)      ??? […]