Which genetic abnormally can be identified through karyotyping? a. recessive allele b. point mutation c. sex linked recessive d. extra chromosome

When analyzing tree rings, what do scientists assume a thin ring indicates?

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.

Did you know that a blue wales tongue weighs more than an elephant?