1) what does selectively permeable mean? why is the cells ability to do so important? 2) describe how the following are important in the makeup of a cell membrane: 1. phospholipid bilayer 2. proteins 3. carbohydrates 4. cholesterol
3) define homeostasis

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species