Pz which of the following is marked by the appearance of organisms with hard parts?
question 8 options:

the beginning of the cenozoic

the end of the precambrian

the end of the mesozoic

the beginning of the cretaceous

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

The economies of nordon could be described a. unable to use rich resources b. struggling but diverse c. dependent on one product d. healthy and diverse

Many feel that the u.s. should not give money to the world bank to aid people in other countries. true or false