Gamma rays have wavelengths of in the range of meters.
a 10-20
b 1012
C 10-4
d 10-12

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting