The one and only President of the Confederate States of America was:

The highest-ranking American general in the war against Mexico (nicknamed “Old Fuss and Feathers”) completed his successful military campaign by fighting his way from the Mexican gulf coast to Mexico City, forcing a Mexican surrender.  Who was he?

The best 19th century example of an internal development (infrastructure) project that ultimately had tremendous economic impact was the Erie Canal (completed in 1824).  This canal helped turn which American city into the country’s most important port city?

The highest-ranking American general in the war against Mexico (nicknamed “Old Fuss and Feathers”) completed his successful military campaign by fighting his way from the Mexican gulf coast to Mexico City, forcing a Mexican surrender.  Who was he?

The Italian explorer who accidentally “discovered” America in 1492 was

The Vice President who assumed the presidency after Lincoln’s assassination was

Researchers wanted to determine if pesticide X was effective at killing grasshoppers that typically invade cornfields. Two ten-acre cornfields located 1 mile apart were chosen. The cornfield to the west was sprayed only with water. The cornfield on the east received the same amount of water with a 10% solution of pesticide X. Grasshopper abundance was measured in the fields every week for 10 weeks.  The results were: West field – the number of grasshoppers doubled East field – the number of grasshoppers declined by 50% Which field was the control group?

Deep in the ocean are communities nestled around hydrothermal vents where super-heated water springs from the bottom of the ocean.  No sunlight ever penetrates to these deep regions. The water from the vents is rich in dissolved minerals such as hydrogen sulfide which supports a large population of chemoautotrophic bacteria that use sulfur compounds to form organic matter by chemosynthesis.  These communities frequently have worms, clams, shrimp, and many other organisms clustered together. In hydrothermal vent communities, shrimp feed on the chemoautotrophic bacteria, and large weird fish feed on the shrimp. This food chain represents a ___.   

The maximum population density that a habitat can support without long-term degradation is called its ___.

Which of the following best illustrates bias in scientific investigations?