Spontaneous natural selection requires an advanced level of organization at the micro-biological stage.

Any selection of letters requires an informed introduction to guide the reader and to provide a meaningful context.

The hardy selection called Wildwood is bushier than the species, and might require slightly less top pruning.

The selection of a judge requires a two-thirds majority.

The selection requires ratification at a commission meeting next month to become final.

His selection requires the approval of President Clinton and the Senate, which is expected.

Research has found that semantic selection requires a greater attentional resources than physical selection.

This selection is not difficult and requires no academic training.

Natural selection for genomic imprinting requires genetic variation in a population.

The Governor's selection is final and requires no further approval by any governmental body.