What makes ribosomal rna useful as a molecular clock?

-a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations.

-its rate of mutation increases over time as organisms continue to evolve and differentiate from each other.

-a slow mutation rate makes it useful for determining evolutionary relationships between ancient species.

-it is only found in select organisms, making it easier to compare relationships between species that have it.

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

This is the interaction of two organisms where one is and the other is neither nor harmed.