The iris focuses light rays before they enter the posterior portion of the eye
Plankton is part of an aquatic ecosystem
Answer:
Large molecules made up of many small organic molecules that are often referred to as monomers. Macromolecules are polymers of monomers.
sorry if I am wrong
The fertilized egg begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive theegg. ... At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst.
