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EEES Exam 1

Terms in this set (36)

Which of the following factors inhibits harmful algal blooms (HABs)?
cold temperatures
The rate of environmental changes on Earth is
slow, and therefore our ability to predict consequences is enhanced
What macromolecule carries the genetic blueprint of a cell?
nucleic acids
Deserts are often located downwind of what landscape feature?
Mountain ranges
Why have scientists, farmers, and politicians stored the world's seed heritage on a remote island in the Arctic?
Consistent temperatures and humidity for seed survival; polar bears and remoteness are great deterrents for terrorists; if the facility's climate control fails, the seeds will only freeze
Which of the following statements is true about biodiversity?
the age of an ecosystem can be an indicator of biodiversity
Biodiversity is measured at which of the following scales?
Genes; species; ecosystems
How were zebra mussels originally introduced to the Great Lakes?
Ship ballast water
How do invasive species threaten the survival of native species?
resource competition; predation; diseases
Which of the following statements is true about extinction?
Extinctions of most existing species has occurred roughly five times
A recently introduced exotic species that has dramatically altered the ecology of its new home is
zebra mussels in the Great Lakes
What is the present day extinction rate?
About 1000 times faster than the background rate
What organisms must consume other organisms to obtain energy?
Heterotrophs
The first species to live on new land, such as those formed from volcanic lava, are called
pioneer species
What is the relationship between two species in which one species benefits from the interaction whereas the other species neither benefits nor is harmed?
Commensalism
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