Viral resistance in crops would be regulated by which agency?
A) FDA
B) USDA
C) EPA
D) USPTO
E) None of these choices
B
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Which one of the following is considered to be an important plant hormone that helps plants cope with environmental stresses?
A. Auxins.B. Prostaglandins. C. Ethylene. D. Abscisic acid. E. Cytokinins.
Which one of the following sequences represents taxa arranged in order from largest, most all inclusive, to smallest?
A) kingdom, domain, phylum, order, class, genus, species, family B) domain, kingdom, phylum, class, order, family, genus, species C) domain, kingdom, phylum, class, order, genus, species, family D) species, genus, family, order, class, phylum, kingdom, domain E) kingdom, phylum, domain, class, order, genus, species, family
The blood vessels of the umbilical cord are derived from which one of the following structures?
A) allantois B) chorion C) embryonic disk D) amnion E) yolk sac
When a reciprocal translocation occurs, part of one chromosome is exchanged with a part of another chromosome
For example, one half of Chromosome 3 may now be found fused to Chromosome 10, and part of Chromosome 10 is now found fused to Chromosome 3. In a balanced reciprocal translocation, an even exchange of material occurs such that no genetic information is extra or missing. Individuals can carry balanced reciprocal translocations and be quite healthy. Consider the case where a gamete containing a balanced reciprocal translocation of a single chromosome is used to fertilize a genetically normal egg. Explain why individuals carrying a single balanced reciprocal translocation might have problems with chromosome segregation during meiosis but not in mitosis.