Exam 47: The Biosphere

____________________ is a process in which unrelated species in separated parts of a biome develop similar characteristics,such as water-storing stems in North American cacti and African euphorbs.

Oxygen content in flowing water is high when the water is ____.  

Respond to the following statements with reference to the five biomes listed below. -In this biome you would expect to find soggy masses of vegetation which has not decayed.

Choose the one most appropriate answer for each. -Seamounts

Deserts typically form at ____ latitude where ____.  

Freshwater lakes in temperate regions will turn over in the ____.  

Respond to the following statements with reference to the five biomes listed below. -This biome is characterized by a crust comprising cyanobacteria,lichen,mosses,and fungi.

What situation causes stress to reefs?  

Which factor has the LEAST effect on the amount of incoming light that strikes an area?  

Choose the one most appropriate answer for each. -Benthic province

Desert plants have the following characteristics that help them adapt to the desert climate,except which one?  

What characteristic is unlikely to be associated with arctic tundra?  

Choose the one most appropriate answer for each. -Littoral zone

Vast ____________________ form in the interior of midlatitude continents.

Ocean currents ____ in the Northern Hemisphere and ____ in the Southern Hemisphere.  

No fishes survive when the oxygen content of water falls below ___________________.

El Niño and La Niña ____.  

In summer,a(n)____________________ prevents upper and lower waters from mixing,causing low oxygen content in deeper waters.

Choose the one most appropriate answer for each. -Savanna

The taiga or boreal forest is best described as what type of forest?