The carrying capacity is the population size at which dN/dt
A) is positive.
B) is negative.
C) is equal to 0.
D) is equal to N.
C
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Monoclonal antibodies are those that:
a. react with many different types of anti-gens. b. react with many species of bacteria within the same genus. c. are produced by the offspring of a single hybrid cell. d. can be produced from many different spe-cies of host organisms.
Increasing global population, overcrowding and international travel have contributed to many changes in epidemiological trends of infectious disease. Which of the following would have been just as likely to occur a century ago as today?
A. The incidence of bubonic plague in humans, transmitted via the rat flea, is gradually increasing in the United States with most of the cases reported in the west. B. Gonorrhea, one of the oldest known STDs, is becoming increasingly difficult to treat due to multi-drug resistance strains of Neisseria gonorrhea. C. An individual was placed under a government-ordered isolation after traveling while infected with a drug resistant strain of Mycobacterium tuberculosis. D. West Nile encephalitis, a zoonotic disease caused by a virus first isolated in Uganda, is now a world-wide pandemic in human and animals.
What is the principal driving force for guttation?
a. pumping by the xylem cells b. sunlight c. passive transport d. root pressure
What localization occurs for proteins that are normally nuclear when their nuclear localization signal is deleted and the protein is injected into the cytoplasm of cultured cells?
a. Nucleus b. Cytoplasm c. In a ring around the outside of the nuclear envelope d. Extracellular