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 lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..
The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..