Why do you think the lungs need all these parts?
no links real answer

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.

What is gene flow? apexa: selection for average traits b: when a population splits in twoc: a mutation becoming more commond: genes moving between two populations

Brendan made a diagram to compare and contrast the benefits of two types of social behavior. which description belongs in the area marked "z"? reproductionprotectionforaginghydrodynamic efficiency