The narrow neck of the uterus which extends into the vagina and dilates (widens) during childbirth:

How do you date a sample of rock that you suspect as being one of the earliest on earth

Explain the significance of thesaurus geographicus

How does the diagram explain ocean currents? earth tilt 23.5 degreesquestion 1 options: earth's tilt causes uneven heating of earth which causes currents.earth's tilt causes the ocean to move because of gravity.earth's tilt and its rotation cause currents.earth's tilt causes uneven distribution of salt which causes currents.