As precipitation infiltrates into the subsurface soil, it generally forms an unsaturated zone and a saturated zone. In the unsaturated zone, the voids-that is, the spaces between grains of gravel, sand, silt, clay and cracks within rocks-contain both air and water. Although a lot of water can be present in the unsaturated zone: why can't this water be pumped by wells A) Soils, like clay, absorb water quickly
B) Sinkholes collect water above the water table.
C) Land with no slope lets water runoff at a fast rate.
D) If its not any of the other its this

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.