Identify three reproductive isolating mechanisms and briefly outline how each may contribute to the
formation of new species. What will be an ideal response?
Temporal isolation is a barrier to reproduction when similar species reproduce at different times.
Behavioral isolation prevents fertilization when similar organisms have distinctive courtship
behaviors.
Hybrid inviability fails to create new species because the hybrid does not reach reproductive age.
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When growing plants in culture, indoleacetic acid (IAA) is used to stimulate cell enlargement. Which plant growth regulator has to be added next to stimulate cell division?
A) ethylene B) indoleacetic acid C) gibberellin D) cytokinin E) abscisic acid
Resistance to chloroquine and mefloquine has been identified in which Plasmodium spp.?
a. P. ovale b. P. vivax c. P. falciparum d. P. malariae
If tyrosine and isoleucine undergo condensation, the new bond that is formed is between the:a
oxygen of the R group and the hydrogen of the amino group. b. carbon of the R group and the nitrogen of the amino group. c. carbon of the carboxyl group and the hydrogen of the R group. d. carbon of the carboxyl group and the hydrogen of the amino group. e. carbon of the carboxyl group and the nitrogen of the amino group.
Explain how linear DNA can be supercoiled
What will be an ideal response?