A population of 137 prairie dogs have taken up home in schools football field! The area of a football field is 7140 m2 . What is the population density of prairie dogs in the football field?

What arrow on the map points to an air mass moving toward a cold front

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat