1. Why does little sunlight reach the floor of coniferous forests?
a.)trees grow in dense stands
b.)the far north gets little sun
c.)the soil is poor
d.)these forests lack diversity
2. In North America, in what direction would you usually have to travel to go from a coniferous forest to a deciduous forest?
a.)north
b.)south
c.)east
d.)west
3. Which deciduous forest layer gets the least sunlight?
a.)understory layer
b.)shrub layer
c.)canopy
d.)forest floor
4. What abiotic factor causes organic matter to decay more rapidly in deciduous forests than in coniferous forests?
a.)colder and dryer winters
b.)warmer and wetter summers
c.)more topsoil
d.)higher canopy
5. Animals might not return to a replanted deciduous forest because of its..?
a.)rapid tree growth
b.)empty niches
c.)lack of plant diversity
d.)greater openness
6. The tropical zones have stable year-round temperatures because of their
a.)abundant rainfall
b.)mountainous terrain
c.)long growing season
d.)nearness of the equator
7. The teeming diversity of rain forests had led to
a.) too many communities
b.)overcrowding of herbivores
c.)species specialization
d.)life higher up in trees
8. Since 1950, what percentage of Earth’s rain forests have been lost to deforestation?
a.) 10%
b.) 6%
c.) 60%
d.) 40%
9. Which of the following is not a reason why rain forests are cleared?
a.)to find new species
b.)to make grazing land
c.)to export wood
d.)to make farmland
10. Which of the following statements is NOT TRUE of coniferous forests?
a.)rainfall is scarce
b.)seasonal temperatures vary widely