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...
Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..
The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..
