Which of the following is NOT an example of how tumors evolve?
A) Tumor cells can spread throughout the body.
B) Tumor cells show genetic variability.
C) Tumor cells grow uncontrollably.
D) Tumor cells pass on mutations when they divide.
A
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A country's ecological footprint can be calculated by multiplying its population size by the footprint of each individual. Why are some ecologists concerned about the ecological footprint of a country like India
A. Its population is increasing. B. Its standard of living and land area are increasing. C. Its population and land area are increasing. D. Its standard of living is increasing. E. Both its population and standard of living are increasing.
an mRNA transcript of the human XYZ gene was introduced into a yeast cell, the transcript would be:
a. degraded immediately. b. translated into a yeast-specific gene. c. translated into the human XYZ protein. d. exported outside the cell. e. transcribed into the XYZ mRNA.
A secondary plant compound might be used for which of the following?
a) a new crop variety b) a new drug c) a soil nutrient d) a crop pest
White blood cells (WBCs) are more resistant to lysis than red blood cells (RBCs). When looking at a sample of blood for WBCs, what could you do to reduce interference from RBCs?
A) Mix the blood in a salty solution to cause the RBCs to lyse. B) Mix the blood in an isotonic solution and allow the WBCs to float to the top. C) Mix the blood in a hypotonic solution, which will cause the RBCs to lyse. D) Mix the blood in a hypertonic solution, which will cause the RBCs to lyse.