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Massachusetts Comprehensive Assessment System


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MCAS QUESTION OF THE DAY:

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GRADE High School
Download PDF Document 2017 Module Introduction
Plasmodium is a genus of organisms in the kingdom Protista. Four species of Plasmodium cause a disease called malaria in humans. Plasmodium uses both humans and female Anopheles mosquitoes to complete its life cycle. Mosquitoes carry Plasmodium and transmit it from one human to another. The diagram below represents a simplified life cycle of Plasmodium.The title of the diagram is Life Cycle of Plasmodium.  The diagram has three boxes linked by three curved arrows forming a circle.  In each box is text and there is also text outside each arrow.  At the top of the diagram above a curved arrow is this text: Plasmodium is transmitted to a mosquito when the mosquito bites an infected human. The box to the right that the arrow points to contains the text: Mosquito Stage. Plasmodium sexually reproduces in the mosquito digestive system. Offspring travel to the mosquito’s salivary glands. An arrow from this box points to a second box. Outside this arrow is this text: Plasmodium is transmitted to human blood when an infected mosquito bites a human. The second box contains the text: Human Liver Stage. Plasmodium enters the human liver and asexually reproduces within liver cells. A line with an arrow at the end leads to a third box. Outside the line is this text: The new Plasmodium cells are released from the liver to the bloodstream. The third box contains the text: Human Red Blood Cell Stage. Plasmodium enters the red blood cells and asexually reproduces. The red blood cells burst, releasing more Plasmodium. An arrow leads from this box to the first one and the circle diagram is complete.Humans experience malaria symptoms during the red blood cell stage. These include fatigue, high fever, and other flu-like symptoms. Malaria can be fatal if it is not treated. Some efforts to prevent malaria focus on eliminating mosquito populations, but a rise in the number of pesticide-resistant mosquitoes is making these efforts less effective.

2017 February Biology, Biology - High School
Download PDF Document Question 10 - Multiple-Choice

Reporting Category: Evolution and Biodiversity
Standard: 5.3 - Explain how evolution through natural selection can result in changes in biodiversity through the increase or decrease of genetic diversity within a population.

 
To treat malaria, doctors must know which species of Plasmodium is causing the disease. Which of the following statements best explains why doctors must identify the Plasmodium species involved before treating the disease?
 
 
 

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Last Updated: October 3, 2018
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