In the 1820s and 1830s,railroads

question 29

Multiple Choice

In the 1820s and 1830s,railroads

• A)played a relatively small role in the nation's transportation system.
• B)standardized both the gauge of tracks and timetables.
• C)saw its greatest development in the southern slave states.
• D)became the dominant form of transportation in the nation.
• E)had not yet been constructed in America.

Explain the hypothesis for genome size and the effectiveness of purifying selection.

Understand how gene duplication can lead to novel functions or pseudogenes.

Recognize the impact of genome size variation among different organisms and the factors contributing to it.

Explain the significance of studying the genomes of pathogens to understand their evolution and impact on human health.