Which of the following explains why the mucus plug is released before birth? It allows the amniotic sac to break.

It initiates uterine contractions.

It allows the cervix to fully dilate.

It is no longer needed to block the cervix.

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Explain how scientists use geologic time to determine the age of landforms.

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls