Consider an ant that is walking on a cartesian grid, starting at (0,0) and ending at (20, 15). the ant always chooses to walk exactly one unit either up or to the right (towards his destination) whenever he arrives at a lattice point. (a lattice point is a point with integer coordinates.) thus, from (0,0) he either walks to (1, 0) or (0, 1). if the ant is not allowed to go to the points (12, 5) and (17, 11), how many different paths can he take on his walk?

idk

step-by-step explanation:

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.  

i use my brain for prombles like this maybe you could try it

step-by-step explanation: