Answer:
Pentane with molecular formular C5H12 exists in three isomeric forms which are normal pentane, isopentane and neopentane. These isomers are structural isomers. Structural isomers are chemical compounds which have the same molecular formular and but different space arrangements. The order in which they are arranged is the only difference between them.
Answer:
Promoter 2
Explanation:
Promoter 2 is the best choice because the resistance gene will only be expressed in the leaves of the corn plant. Promoter 3 only expresses genes in the corn roots, so the toxin would not be available in the leaves for the pest to eat. Promoters 1 and 4 would express the resistance gene in the leaves of the corn plant, but the toxins would be expressed in the corn cobs as well, which may then be fed to livestock.
Air, water, weather, temperature and other organisms.
