Which of the following is a set of techniques that separates molecules based on various characteristics? A. Precipitation
B. Centrifugation
C. Filtration
D. Chromatography

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Witch theory suggests all living things are made up of cell or cells

What form of anesthetic was used for field surgery