A Widget Fails 12 Times in 600 Hours of Operation

question 69

Multiple Choice

A widget fails 12 times in 600 hours of operation.The MTBF of the widget is ______.

• A)50 hours
• B)45 hours
• C)32 hours
• D)31 hours

Recognize the historical shifts in plant dominance throughout geological time and the factors driving these changes.

Analyze the relationship between plant evolution and environmental changes.

Discuss the significance of specific plant structures in reproduction and dispersal.

Describe the contributions of seed plants to biodiversity and ecological systems.

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Definitions:

Harriet Tubman

An American abolitionist and political activist who escaped slavery and subsequently made some thirteen missions to rescue approximately seventy enslaved people using the network of antislavery activists and safe houses known as the Underground Railroad.

Underground Railroad

A network of secret routes and safe houses used in the United States during the early to mid-19th century to help enslaved African Americans escape to free states and Canada.

Runaway Slaves

Enslaved African Americans who escaped from their enslavers in an attempt to gain freedom, often facing great risk.

Civil War

A war between citizens of the same country, fighting for different ideals, governance, or territories.