Identify the practice by which humans use biological understanding to solve practical problems, and give an example of this practice.

20 the compound al(nh3)2 has atoms of nitrogen.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

If t=tall and t=short what will be the physical appearance of the offspring the cross below? a.some will be tall and some will be short b.they will all be tall c.they will all be short d.they will be medium height