Accessory in anatomy, denoting certain muscles, nerves, glands, etc. That are auxiliary or supernumerary to some similar, generally more important thing. Synonym: accessorius. Origin: L. Accessorius, fr. Ac-cedo, pp. -cessus, to move toward..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..
