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TLS Online TPP Program

#Question id: 9169

In areas of permafrost, stands of black spruce are frequently observed in the landscape, while other tree species are noticeably absent. Often these stands are referred to as "drunken forests" because many of the black spruce often "lean over" (that is, they are displaced from their normal vertical alignment). What is the most likely explanation for the unusual growth of these forests in this marginal habitat?


#Unit 9. Diversity of Life Forms
  1. Branches are adapted to absorb more carbon dioxide with this displaced alignment.
  2. Taproot formation is impossible, so trees developed shallow root beds
  3. Trees are tilted so snow prevents them from breaking or tipping over.
  4. Trees tip so that they do not compete with each other for sunlight.
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TLS Online TPP Program

#Question id: 8927

#Unit 9. Diversity of Life Forms

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that
TLS Online TPP Program

#Question id: 8854

#Unit 9. Diversity of Life Forms

Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?
TLS Online TPP Program

#Question id: 18594

#Unit 11. Evolution and Behavior

Rapid development of angiosperms during___
TLS Online TPP Program

#Question id: 23835

#Unit 2. Cellular Organization

Which of the following is NOT a key determinant of Myosin V?
TLS Online TPP Program

#Question id: 16108

#Unit 7. System Physiology – Animal

What is the result of a rise in body temperature?