spinnbarkeit The stringy, elastic character of cervical mucus during the ovulatory period; in contrast to other times in the menstrual cycle, cervical secretions at midcycle are clear, abundant, and of low viscosity. Origin: Ger. Spinnbarkeit, visxosity, ability to form a thread..
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
