The drug Humulin is a modified form of the human insulin protein that is used to treat diabetes. Describe the process that would allow a drug company to take the gene responsible for producing this protein and, using bacteria, produce large amounts of
this human protein.
What will be an ideal response?
An insulin gene is isolated from a human pancreatic cell. This DNA is inserted into a bacterial plasmid, which is taken up by a bacterial cell. The cells are grown in volume, and the protein is collected.
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Which of the following are examples of convergent evolution in plants? Select all correct choices
A. the vascular cambia of gymnosperms and angiosperms B. the vascular cambia of quillworts (Isoetes) and angiosperms C. water transport in ferns and some bryophytes D. the leaves of lycophytes and gymnosperms E. pollen in angiosperms and gymnosperms
Which element is considered an essential micronutrient for plants?
a. gold b. carbon c. uranium d. nitrogen e. copper
Two species of buttercup are found in a field in North Dakota, and they tend to flower at approximately the same time in early spring
When some ecology students decided to conduct an experiment in community dynamics, they selectively removed one species from the field by hand-picking all emergent plants. The remaining species showed a significant increase in its population size during the next season. This study demonstrated A) niche realignment. B) habitat fragmentation. C) interspecific competition. D) niche fragmentation. E) intraspecific competition.
The most common bacterial cause of diarrhea that sends people to doctors in the United States is
A) Salmonella. B) Staphylococcus. C) Vibrio. D) Escherichia. E) Campylobacter.