Answer:
Disease can be density-dependent because organisms have to live close enough to one another for the disease to spread.
Think of it as a zipper. The top zipper is the leading strand, the bottom is the lagging, and the actual zipper thing is the helicase unwinding the 2 parts. You need the top and bottom strands to have a replication fork
Convective zone which is the final 30 percent of the sunset radius. is dominated by convection currents that carry the energy outward to the surface.. the convection currents carry photons outward to the surface faster than the radiative transfer that occurs in the core and radiative zone
