Erector
1. One who, or that which, erects.
2. (Science: anatomy) a muscle which raises any part.
3. (Science: physics) An attachment to a microscope, telescope, or other optical instrument, for making the image erect instead of inverted.
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..
For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..
