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...
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..
