Which of these is changed by the Milankovitch cycles? A. the reflectivity of Earth

B. the amount of solar energy that reaches Earth

C. the duration of seasons on Earth

D. the length of a year on Earth

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

Classify the structures as homologous or analogous, depending on their structure and function.

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.