By Mary S. Tyler
ISBN-10: 0878938737
ISBN-13: 9780878938735
This entry card code offers entry to over a hundred and forty interactive movies and three hundred labelled images teaching scholars at the existence cycles of organisms, a laboratory guide containing difficult experiments, interactive puzzles and net hyperlinks, an entire word list with rollover definitions, examine questions and a laboratory talents advisor.
Read Online or Download Developmental Biology: A Guide for Experimental Study (Third Edition) PDF
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Extra info for Developmental Biology: A Guide for Experimental Study (Third Edition)
Example text
This simplicity is one of the reasons for studying these organisms. With only a limited number of cell types, development and behaviors can be examined at the cellular, biochemical, and even genetic levels. The species of Mycetozoa most widely used for such studies is Dictyostelium discoideum. 1) starts with the hatching of myxamoebae from the cellulose encasements of the spores. Under favorable conditions of moisture and warmth, each spore releases a single, haploid (N = 6) myxamoeba (or simply, amoeba).
Though genetic manipulations are beyond the scope of this laboratory, many other realms are open to you. Use your imagination. Design simple experiments that will yield sophisticated answers. Keep in mind that a chemical usually has more than one effect. And enjoy this experimental playground. Cellular Slime Molds 4-5 Culture procedures The following is a conventional method for culturing slime molds. Petri dishes may already have been prepared for you with nutrient agar, a culture medium described below.
Field diaphragm: Microscopes with a built-in light source usually have a field diaphragm. This regulates the diameter of the cone of light coming from the light source. This must be properly adjusted to attain maximum resolution of the microscope. Iris diaphragm: A diaphragm attached to the condenser that when properly adjusted excludes stray, refracted light from coming through the condenser that would interfere with sharp imaging. If you close down the iris diaphragm too much, you produce a grainy image with increased contrast at the expense of resolution.
Developmental Biology: A Guide for Experimental Study (Third Edition) by Mary S. Tyler
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