Chapter 6: Understanding Biomes

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Questions and Answers

What is a biome?

  • A large region characterized by a specific type of climate and certain types of plants and animal communities (correct)
  • A small region with specific climate and plant communities
  • An area with no specific climate or plant communities
  • A medium-sized area with diverse climate and vegetation

What is the defining characteristic of tropical rainforests?

  • Low sunlight and frequent rainfall
  • Mild temperatures and abundant rainfall (correct)
  • Extreme temperatures and minimal rainfall
  • Hot temperatures and infrequent rainfall

Why do tropical rainforests play crucial roles in global climate regulation?

  • They have a low concentration of plant species
  • They have a high concentration of decomposers
  • They maintain a warm, humid climate
  • Due to their proximity to the equator, they receive strong year-round sunlight (correct)

How are nutrients transferred in tropical rainforests?

<p>Nutrient transfer is efficient, making runoff from rainforests as pure as distilled water (D)</p> Signup and view all the answers

What happens to cleared tropical soils?

<p>They become nutrient-depleted, limiting agriculture sustainability (C)</p> Signup and view all the answers

Why do some trees in tropical rainforests form buttresses or braces?

<p>To provide support in thin soil (C)</p> Signup and view all the answers

Which layer of the rainforest absorbs up to 95% of sunlight?

<p>Upper canopy (D)</p> Signup and view all the answers

What is the main threat to tropical rainforests according to the text?

<p>Habitat destruction (B)</p> Signup and view all the answers

Which group of animals inhabits the emergent layer of the rainforest?

<p>Eagles, bats, and monkeys (D)</p> Signup and view all the answers

What adaptation do collared anteaters use for hunting prey in the rainforest?

<p>Long tongue to reach prey (A)</p> Signup and view all the answers

What is the estimated percentage of Earth's surface that tropical rainforests once covered?

<p>20% (C)</p> Signup and view all the answers

What role do tall trees in temperate forests play according to the text?

<p>Provide habitats for diverse animals (B)</p> Signup and view all the answers

How is the understory of the rainforest described in terms of light exposure?

<p>Receives very little light (D)</p> Signup and view all the answers

What poses a significant concern for tropical rainforests according to the text?

<p>Loss of natural vegetation cover due to deforestation (A)</p> Signup and view all the answers

Which group of plants grow on tall trees in the canopy layer of the rainforest?

<p>Epiphytes like orchids (C)</p> Signup and view all the answers

How do decomposers contribute to nutrient transfer in tropical rainforests?

<p>Decomposers break down dead organisms, returning nutrients to the soil, but plants quickly absorb them.</p> Signup and view all the answers

Why does the cleared tropical soil lack nutrients, limiting agriculture sustainability?

<p>Most nutrients in tropical rainforests are within plants, not the soil, and decomposers facilitate rapid decay.</p> Signup and view all the answers

What crucial roles do tropical rainforests play in global climate regulation?

<p>Tropical rainforests play crucial roles in global climate regulation and nitrogen, oxygen, and carbon cycles.</p> Signup and view all the answers

What poses a significant concern for tropical rainforests according to the text?

<p>Cleared tropical soils lack nutrients, limiting agriculture sustainability.</p> Signup and view all the answers

Why do some trees in tropical rainforests form buttresses or braces?

<p>Some trees in tropical rainforests form buttresses or braces for extra support in thin soil.</p> Signup and view all the answers

What specific adaptation does the wreathed hornbill use?

<p>Cracks open nutshells with a strong beak</p> Signup and view all the answers

What is the estimated percentage of Earth's surface that tropical rainforests once covered?

<p>20%</p> Signup and view all the answers

What is the main threat to tropical rainforests according to the text?

<p>Habitat destruction</p> Signup and view all the answers

What poses a significant concern for tropical rainforests according to the text?

<p>Exotic-pet trading</p> Signup and view all the answers

What is the role of tall trees in temperate forests according to the text?

<p>Home to the oldest and largest organisms</p> Signup and view all the answers

What specific resource do rainforest animals use to avoid competition?

<p>Specific resources</p> Signup and view all the answers

How are nutrients transferred in tropical rainforests?

<p>Through decomposition and recycling</p> Signup and view all the answers

What is the defining characteristic of tropical rainforests according to the text?

<p>Highest species diversity</p> Signup and view all the answers

Why do tropical rainforests play crucial roles in global climate regulation?

<p>Impact on biodiversity and indigenous communities</p> Signup and view all the answers

What is the primary layer of the rainforest that absorbs up to 95% of sunlight?

<p>Canopy</p> Signup and view all the answers

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