Which of the following could be true of two different species that have a competitive relationship in the same ecosystem?
a, one species preys on the other
b the relationship is mutually beneficial.
c they share the same niche.
d one species benefits, while the other is neither nor harmed

5) these are organisms where the genetic material is not bound by a nucleus. they are usually unicellular.

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.

Explain why the plants cortex would serve as the best food source for animals