Cephalopods are the only mollusks that have a closed circulatory system
Indicate whether the statement is true or false
TRUE
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Gene therapy is performed by ____
a. replacing the genomes of an individual with a brand new set of genomes with the goal of treating a genetic defect b. replacing a defective gene in an individual with a normal gene with the goal of treating a genetic disorder c. transferring a mutated gene into an individual with the goal of treating a genetic defect d. transferring a normal or a modified gene into an individual with the goal of treating a genetic defect e. replacing a defective enzyme in an individual with a normal enzyme with the goal of treating a genetic disorder
Which two of the following statements are true regarding the human microbiome?
a. the human microbiota carries many more genes than the human genome b. healthy people harbor potentially dangerous pathogens, but these are in low abundance c. viruses present in healthy humans infect only the microbiota, not the human cells d. many sites of the human body are sterile, notably the lungs and brain.
The drug Taxol, or Paclitaxel, is used to treat patients with a variety of cancers, including breast, lung and ovarian cancers. The drug works by stabilizing microtubules, and preventing their disassembly. The goal of the drug is to prevent dividing cells from being able to complete mitosis. As a result, cancerous cells can no longer divide. In a cell treated with Taxol, at what stage of mitosis will the cells arrest?
A. Prior to metaphase B. Telophase C. Anaphase D. Cytokinesis
To support the world population at the same standard of living as we have in the United States would require ________ times the resources that are available on Earth today
A) 2 B) 1.5 C) 20 D) 5 E) 10