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.
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..
In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..