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TLS Online TPP Program

#Question id: 9154

The main reason polar regions are cooler than the equator is that ________.

#Unit 9. Diversity of Life Forms
  1. solar radiation strikes the poles at a lower angle and travels through more atmosphere
  2. the poles are farther from the sun than is the equator
  3. the polar atmosphere is thinner and contains fewer greenhouse gases
  4. the poles are permanently tilted away from the sun
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TLS Online TPP Program

#Question id: 5568

#Unit 5. Developmental Biology

Asexual reproduction results in offspring that are genetically identical to their parent. What type of cell process occurs to generate this type of offspring?
TLS Online TPP Program

#Question id: 12537

#Unit 10. Ecological Principles

In terms of nutrient cycling, why does timber harvesting in a temperate forest cause less ecological devastation than timber harvesting in tropical rain forests?
TLS Online TPP Program

#Question id: 18746

#Unit 13. Methods in Biology

Which of the following is a characteristic of Taq polymerase?
TLS Online TPP Program

#Question id: 3839

#Unit 3. Fundamental Processes

Use the figure to answer the following question. In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" (radioactive) nitrogen (15N) and then transferred them to a medium containing 14N (nonradioactive). Which of the results in the figure would be expected after one round of DNA replication in the presence of 14N?
TLS Online TPP Program

#Question id: 2709

#Unit 2. Cellular Organization

Which, if any, of the following statements are false?