Use each of the following terms in a separate sentence: Precambrian time, Paleozoic era, Mesozoic era, and Cenozoic era.

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?