nictitating membrane A transparent fold of skin lying deep to the other eyelids at the mesial side, which may be drawn over the front of the eyeball. It is the so-called third eyelid, found in reptiles and birds generally and in many mammals...
Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
