Welcome to your Infectious Diseases Post Test
The scientists concluded that the plants had grown in a hot climate. Which graph most likely represents the data from the investigation?
Woody plants have many different kinds of leaves. Some leaves have very smooth edges, while other leaves have jagged edges, as shown in the diagram. The characteristics of plant leaves vary with the climate in which the plant naturally grows. Some scientists discovered an area with many fossilized leaves of woody plants. The scientists used data from samples of 100 leaf fossils to compare the number with smooth-edged leaves and the number with jagged-edged leaves.
Which inference is best supported by these data?
A group of scientists studied some trees in a pine forest. In the densely forested areas, the trees were within 1 m of each other. The scientists observed that these trees had dead branches near the ground. They measured the height above the ground at which the first living branches were found on different-sized trees in the forest. Then they repeated this procedure on the same kind of trees in an open meadow. This graph summarizes the scientists' data.
What is the difference in grams between the total mass of the liquid substances and the total mass of the solid substances used in the investigation?
A student measures the mass of several substances and records the results in the table below.
Which of these fish has mouth structures that allow it to eat algae by taking large bites of the hard coral on which the algae grows?
The table gives information about four types of fish. These fish all have mouth structures that allow them to eat different types of food.
Which of these most likely explains why the bacterial population stopped growing?
A scientist added bacteria and a nutrient medium that could support the growth of the bacteria to a sterilized petri dish. No other materials were added. The graph models growth of the bacteria over time.
Describe the overall trend in mean temperature between 1900 and 2000.
This graph shows the global temperature differences collected over 100 years.
The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These cells are one of many kinds of white blood cells that are an important part of the immune system. The most common danger related to the destruction of these white blood cells is —
The Sabin vaccine is a liquid containing weakened polio viruses. Vaccinated individuals become protected against polio because the weakened viruses...
Which pathogen is most likely responsible for causing hoof-and-mouth disease in livestock?
In 1898 Friedrich Loeffler and Paul Frosch found evidence that the cause of the highly contagious hoof-and-mouth disease in livestock was a microscopic infectious particle. It was discovered that this particle requires a host cell to reproduce.
Why is it important to administer an antiviral agent to an infected person within 48 hours of the appearance of symptoms?
H1N1 flu is a highly contagious viral infection caused by the influenza A (H1N1) virus. The symptoms of H1N1 flu are listed in the box below. An antiviral agent administered within 48 hours of the appearance of symptoms can reduce the severity of the illness.