tissue extracts preparations made from animal tissues or organs; they usually contain many components, any one of which may be pharmacologically or physiologically active; extracts may contain specific, but uncharacterised factors or proteins with specific actions...
Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
