What are the conditions required for natural selection? Check all that apply. overproduction of offspring
same traits among all organisms in a population
variation among organisms in a population
favorable adaptations selected by nature
unfavorable adaptations passed on to offspring in larger numbers
favorable adaptations building in population over time

about what?
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The answer is c - the principal of original lateral continuity. 

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.