nodal point One of two point’s in a compound optical system so related that a ray directed toward the first point will appear to have passed through the second point parallel to its original direction. Synonym: axial point...
It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..
Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
