Which ratio of distances is constant for a point on a nondegenerate conic? a. distance to center: distance to directrix c. distance to center: distance to vertex b. distance to focus: distance to vertex d. distance to focus: distance to directrix brain;y

d.

Step-by-step explanation:

For a point on a non-degenerate conic, we have distances, such as the distance to the center, to the directrix, to the focus, or to the vertex.

Now, in this case of a non-degenerate conic, there can be two distances that serve keep a constant relationship due to its geometry and it is:

d. distance to focus: distance to directrix

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

yes the data was not prsented

step-by-step explanation: