In a cladogram, what occurs at a node?
a derived trait appears.
evolution is stopped.
an ancestor dies.
the cladogram ends.

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.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Which of the following organisms are capable of self-fertilization? a. plants b. tigers c. humans