When you flush a toilet, water begins to fill the tank and lift a float attached to a lever. when the water level reaches a certain height, the lever shuts the water valve and prevents the tank from overflowing. what type of regulatory mechanism is at work in this nonloving system?

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 chemical equation is unbalanced? which chemical equation is unbalanced

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer