A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mammal so that the protein will be secreted into the milk of the mammary gland. What is required for the researcher's success?
A. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in mammary cells.
B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells.
C. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in multiple types of cells.
D. The gene should be placed next to the promoter of a gene that is expressed in multiple types of cells.
E. The gene should be inserted in place of the promoter of a gene that is expressed in multiple types of cells.
B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells.
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Escherichia coli uses mixed acid fermentation pathways that depend on which of the following enzymes?
A. Ammonia monooxygenase B. Formate dehydrogenase C. Pyruvate formate-lyase D. C-type cytochrome
In a species of salamander, there are two forms, red and yellow. As the yellow form becomes less common due to predation and the red form more common, the yellow form becomes less likely to be eaten and more likely to survive and reproduce. The yellow form then becomes more common and roles of red and yellow forms reverse. This maintains both forms in the population. This would be an example of
A. negative frequency-dependent selection. B. directional selection. C. disruptive selection. D. balancing selection. E. negative frequency-dependent selection and balancing selection are correct.
Felsenstein (1985 ) developed a method to plot the divergence that arises between sister species as they evolve farther and farther from their common ancestor
This method enables researchers to better evaluate cross-species correlations among traits. The resultant plot provides divergences that arise between pairs of sister species as they evolve away from a common ancestor, and are known as ________. [three words] Fill in the blank(s) with correct word
Which of the following statements about plant macronutrients is/are true? (Check all that apply.)A) They approach or exceed 1% of a healthy plant's dry weight.B) They reduce the need for CO2 during photosynthesis.C) A deficiency in any one can have severe effects on a plant's growth.D) The amount of a macronutrient needed by a plant can be assessed by growing plants in hydroponic solutions.
What will be an ideal response?