What phylum contains jellyfish?
a. Porifera
b. Cnidaria
c. Echinodermata
d. Platyhelminthes
e. Mollusca
b
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Lateritic soils
A. are kept soft and workable by the action of sun and rain. B. are rich in nutrients. C. are common soils in tropical rain forests. D. All of the choices are correct.
Biome composed of a coniferous and deciduous trees with a short summer.
A. pelagic B. pioneer community C. marsh D. euphotic E. boreal forest F. deciduous forest G. grassland H. desert I. tundra J. biochemical oxygen demand K. phytoplankton L. savanna M. littoral zone N. benthic O. periphyton
What is the best definition for nonrenewable resources?
A) finite masses of material which cannot be used without depletion B) ores that are consumed primarily in the developing world C) commodities that command high prices during periods of scarcity D) resources that are below ground E) resources that occur only in nature (like wood)
What combination of factors was responsible for the disaster west of Yellowstone National Park on August 17, 1959?
A) Rock falls filled a lake with debris until the water overtopped the dam and eroded through the concrete. B) Water migrating along foliation layers in the metamorphic rock destabilized a dam, which collapsed and flooded the valley. C) A severe earthquake triggered a slide that blocked a river and flooded a campground. D) Drainage from the reservoir generated a lahar, which destroyed small towns downstream.