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...
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
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..
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
