What might explain the patterns of population density in northern Africa?

What are charcteristics of lithosphere?

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the