Which of the Following Organisms Is a Producer?
Which of the following organisms is a producer? A) kinetoplastids B) apicomplexans C) diatoms D) ciliates
Which of the following approaches would be most likely to cause evolution of a drug-resistant strain of Plasmodium? A) widespread, frequent spraying to kill mosquitoes B) use of a cocktail of three drugs in patients suffering from malaria C) widespread, frequent use of a single drug in patients suffering from malaria D) widespread use of anti-mosquito bed nets
Which of the following statements is accurate with regard to the observation that "income levels in countries hard hit by malaria are 33% lower than in similar countries free of the disease"? A) This observation suggests that symptoms from malaria cause patients to lose pay because they miss work. B) This observation is an example of a correlation and therefore causality cannot be inferred as confidently as if we have results from a manipulated experiment. C) In order to understand the cause of this observation, scientists should eradicate malaria in 10 countries but not in 10 other comparable countries in order to experimentally test whether malaria caused the low income levels. D) The observation demonstrates that correlations provide excellent indications of causality.
Which of the following results would be most likely if a layer of warm, light water caused by ocean surface warming blocks nutrient upwelling? A) reduced populations of fish because they avoid warm water B) increased populations of producers because they have access to more CO₂ C) reduced populations of producers because they have access to fewer nutrients D) increased populations of producers because fewer fish are produced, and they eat fewer producers