An embryo is defined as any organism in a stage before birth or hatching, or in plants, before germination occurs. After cleavage, the dividing cells, or morula, becomes a hollow ball, or blastula, which develops a hole or pore at one end.
All triploblastic animals (Three germ layers / all Bilaterians animals ) can be further divided into Protostomes and Deutereostomes based on the fate of first opening of the development. If in the blastula the first pore (blastopore) becomes the mouth of the animal, it is a protostome and if the first pore becomes the anus then it is a deuterostome. (more…)
Scientists today reported that the tiny light-sensing cells known as rods have been clearly and directly imaged in the living eye for the first time. Using adaptive optics (AO), the same technology astronomers use to study distant stars and galaxies, scientists can see through the murky distortion of the outer eye, revealing the eye’s cellular structure with unprecedented detail. This innovation, described in two papers in the Optical Society’s (OSA) open access journal Biomedical Optics Express, will help doctors diagnose degenerative eye disorders sooner, leading to quicker intervention and more effective treatments. (more…)
An international team of scientists, with Spanish participation, has shed light on cannibalism and infanticide carried out by primates, documenting these acts for the first time in the moustached tamarin (Saguinus mystax). The mothers, which cannot raise their infants without help from male group members, commit infanticide in order to prevent the subsequent death of their offspring if they are stressed and in competition with other females. (more…)
A new University of Colorado Boulder study indicates the infestation of trees by mountain pine beetles in the high country across the West could potentially trigger earlier snowmelt and increase water yields from snowpack that accumulates beneath affected trees.
Led by CU-Boulder geological sciences department doctoral student Evan Pugh, the study was undertaken near Grand Lake, Colo., adjacent to Rocky Mountain National Park, an area that has been devastated by mountain pine beetle attacks in recent years. Mountain pine beetles have killed more than 4 million acres of lodgepole pine trees in Colorado and southern Wyoming since 1996, the most severe outbreak on record. (more…)
Jellyfish can be a nuisance to bathers and boaters in the Chesapeake Bay on the United States’ East Coast and many other places along the world’s coasts.
A new study by researchers at the Virginia Institute of Marine Science (VIMS) shows that jellyfish also have a more significant impact, drastically altering marine food webs by shunting food energy toward bacteria.
An apparent increase in the size and frequency of jellyfish blooms in coastal and estuarine waters around the world during the last few decades means that jellies’ impact on marine food webs is likely to increase in the future.
The results of the study, led by recent VIMS graduate Rob Condon–now a scientist at the Dauphin Island Sea Lab (DISL) in Alabama–appear in this week’s issue of the journal Proceedings of the National Academy of Sciences. (more…)
Springer recently announced two new print books in evolutionary biology series . Here is brief information related to these books and information related to buy theses books if interested.
Principles of Evolution
Book Series: The Frontiers Collection
Editor/s: Meyer-Ortmanns, Hildegard; Thurner, Stefan (more…)
A new book dealing with Hox genes titled Hox genes studies from the 20th to the 21st century under the series of Advances in Experimental medicine and biology , Vol 689 . This book published by Springer Books is edited by jean deutsch and 12 different chapters written by various experts in the field of Hox biology. (more…)
