In dogs, erect ears (e) is dominant over droopy ears (e). what are the results if two heterozygous dogs have a litter of puppies?

The point where two air masses meet is called a

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes. b. it burns more cleanly than crude oil products. c. scientists have developed new ways of extracting it. d. during its extraction, groundwater can be contaminated.