Briefly explain why the adoption of a standard, two-part scientific naming system is helpful to biologists
What will be an ideal response?
"Common names" can create confusion because the same common name may be used for different species and different common names may be used for the same species. In contrast, standard scientific names can be recognized by biologists worldwide and help them avoid confusion when discussing organisms. In addition, the two-part name makes it easy for biologists to discern whether two species are closely related (that is, whether they are in the same genus).
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F1 offspring of the cross AA x aa are _____
a. all AA b. all aa c. all Aa d. 1/2 AA and 1/2 aa
The role of CAP in the lac operon is:
a. repression of RNA polymerase binding to the promoter. b. negative control of the lac operon. c. enhancement of RNA polymerase binding to the promoter. d. to inactivate the repressor by binding to its allosteric site. e. the activation of allolactose binding to the repressor protein
A pollen grain is actually the
A) female gametophyte. B) combination of male and female gametophytes. C) male gametophyte. D) primitive egg cell, which will develop into the embryo. E) megaspore mother cell.
The primary risk to humans infected with Echinococcus granulosus is
A) development of cysticerci. B) formation of hydatid cysts. C) intestinal obstruction. D) anemia. E) infection of the fetus.