Why is variety in crop plants important for "food security"? How is this threatened by GM food crops? What is the U.S. position on GM products? How does this differ from the position of other countries?
What will be an ideal response?
Varieties contain genes that, through conventional breeding, might confer resistance to disease, pests, inbreeding, and other pressures that challenge modern agriculture. Monocultures of industrial agriculture place all our eggs in one basket, so that any single catastrophe could potentially wipe out multiple crops. Wild relatives contain genetic diversity that may have ready-made solutions to unforeseen problems. The U.S. position is that GM foods are an acceptable food crop. Many nations refuse to purchase or accept food or seed crops that are GM. The European Union has been extremely outspoken against the use or trade of GM foods.
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What are common air pollutants?
What will be an ideal response?
The body waves that can only pass through solids are
A) primary (P) waves. B) tertiary (T) waves. C) secondary (S) waves. D) quaternary (Q) waves.
_________ were source areas for westward migration, and migrants from these regions carried with them the cultural traditions from their culture hearth.
-Western European countries -Western European countries and the 13 original colonies -The thirteen original colonies -The three core regions -The three core regions and Western European countries
Submarine canyons were most likely formed by ________
A) deposition of terrestrial sediment B) earthquake activity C) wind erosion in the past D) erosion by turbidity currents E) scouring by glaciers during the last ice age