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...
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..
Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..
This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
