Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..
Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..