speract
sea urchin peptide hormone, from the jelly coat of the eggs of the sea urchins Strongylocentrotus purpuratus and Hemicentrotus pulcherrinus, affecting motility and metabolism. Receptor is a plasma membrane guanylate cyclase.
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..
