What type of flower should you plant in your garden if you are particularly interested in attracting butterflies?
A. White day-blooming flowers with abundant pollen and a strong floral scent.
B. Pendulous red flowers that are open day and night with no scent.
C. Yellow flowers with abundant pollen and nectar and a strong floral scent.
D. White, night-blooming flowers with a strong floral scent.
E. Purple, tubular-shaped flowers with a light floral scent.
E. Purple, tubular-shaped flowers with a light floral scent.
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How could personal DNA testing be beneficial to medicine? What will be an ideal response?
Once a gene has been cloned, it can be used for
A. disease diagnosis. B. detecting heterozygotes in the population. C. making biosynthetic products for commercial use. D. all of these. E. none of these.
Nonspecific internal defenses include
A) plasma cells. B) skin. C) tears and saliva. D) inflammation. E) T cells.
What part of the DNA replication process would be most directly affected if a strain of bacteria lacking DNA ligase were used to make the cell extracts?
(a) initiation of DNA synthesis (b) Okazaki fragment synthesis (c) leading-strand elongation (d) lagging-strand completion