Definition noun A medical term used to refer to a condition or state in which a woman has never given birth to a child, or has never carried a pregnancy. Supplement Word origin: from Latin nūllus, none + parere, to give birth. Related forms: nulliparous (adjective). Compare: multiparity...
A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..
Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..
Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..
