Which of the following buldings is an example of the application of bronze age architectural innovation?
a. a concrete lighthouse
b. a stone pyramid
c. a mud-brick house
d. a steel skyscraper

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

Each member of a class sampled a piece of ptc testing paper. thirty people sampled the chemical. twenty persons were tasters. how many had heterozygous genes? 10 20 0-20 indeterminate

How do light years astronomers to determine the ages of distant objects in space ?