Exam 58: The Biosphere

Which one of the following marine ecosystems would be expected to have the lowest species diversity and primary production per unit area?

Drifting freely in the upper, well-illuminated waters of the ocean, a diverse biological community exists, primarily consisting of microscopic organisms called

Which two countries are both likely to have prevailing winds blowing from west to east?

The great deserts and associated arid areas of the world mostly lie along the western sides of the continents at about

CO₂ and other gases, which absorb the longer wavelengths of infrared light and radiated heat from Earth, are responsible for causing the

Rhizosphaera needle cast is a fungal disease that affects spruce trees.Which of the following biomes would be most severely affected by an outbreak of this disease?

During an ecology field trip to a lake, your professor asks you to take temperature readings at various depths and record your data.At 5 meters, you note a temperature of 25 $\degree$ C and at 10 meters you record a temperature of 10 $\degree$ C.Readings at 20 meters and below stay fairly consistent around 8 $\degree$ C.The temperature readings of 25 $\degree$ C, 10 $\degree$ C, and 8 $\degree$ C represent the:

Tropical climates are warmer than temperate climates because

Which statement best describes the relationship between elevation and latitude?

Most of the ultraviolet radiation reaching the upper atmosphere is absorbed by

Oxygen levels in the photic zone fluctuate over the course of a 24-hr period.If you were measuring dissolved oxygen over the course of the day, when would you expect to see the lowest levels of oxygen and why?

Scientists cannot predict when an El Niño will begin.But once it does, forecasters are able to predict changes to weather patterns.What would be a predicted weather effect of an El Niño?

The relatively shallow part of the ocean extending from the low tide mark to the edge of the continental shelf is called the

If you plot mean annual precipitation against mean annual temperature and look at the distribution of major biomes relative to these two variables, which biome would be in the central region of the graph?

If the tilt of Earth's axis relative to its plane of orbit was increased to 30 degrees, the seasons in Boston would become less distinct.

Periodic disturbances of the Pacific currents that cause global weather changes are given the name

Temperate grasslands and temperate deciduous forests are two different biomes that are located in the same latitudes.Which one of the following abiotic conditions is most likely to account for the differences in their community composition?

Which of the following adversely affects the ozone layer?

Researchers in Alaska were interested in increasing the sockeye salmon (Oncorhynchus nerka) population in three coastal lakes.To accomplish this, the ponds were treated with fertilizers.As a result, zooplankton biomass increased between 40% and 700% in the three lakes.The substantial growth in zooplankton would suggest that prior to these experiments, these lakes were __________________.

In a temperate zone lake, what should the temperature profile be immediately after the fall overturn?