Which observations would be most helpful in identifying this spider? Check all that apply.
It is shiny black.
It has a red spot on its abdomen.
It has eight legs.
It has a round, plump abdomen.
It has a hard exoskeleton.

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 group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Anton created a chart listing different types of materials. which best complete the chart?