Upgrade to remove ads
Only $35.99/year

BIO exam 2

Terms in this set (85)

Which statement best contrasts environmentalism with ecology?
Ecology provides scientific understanding of living things and their environment; environmentalism is more about conservation and preservation of life on Earth.
Of the following examples of ecological effect leading to an evolutionary effect (→), which is most correct?
A few individuals with denser fur survive the coldest days of an ice age → the reproducing survivors all have long fur.
Which of the following levels of organization is arranged in the correct sequence from most to least inclusive?
ecosystem, community, population, individual
Which of the following statements about ecology is incorrect?
Ecology is a discipline that is independent from natural selection and evolutionary history.
Which of the following is responsible for the summer and winter stratification of deep temperate lakes?
Water is densest at 4°C.
Experts in deer ecology generally agree that population sizes of deer that live in temperate climates are limited by winter snow. The deer congregate in "yarding" areas under evergreen trees because venturing out to feed in winter is energetically too expensive when snowfall depths accumulate to above 40 cm. Deer often stay yarded until the spring thaw. Snow depth over 40 inches for more than 60 days results in high mortality due to starvation.
This observation best illustrates which of the following principles about factors that limit distribution of organisms?
Environmental factors are limiting not only in amount but also in longevity.
In mountainous areas of western North America, north-facing slopes would be expected to
support biological communities similar to those found at higher elevations on similar south-facing slopes.
Deserts typically occur in a band at 30 degrees north and south latitude because
descending air masses tend to be cool and dry.
Turnover of water in temperate lakes during the spring and fall is made possible by which of the following?
the density of water changes as seasonal temperatures change.
Which of the following events might you predict to occur if the tilt of Earth's axis relative to its plane of orbit was increased 33.5 degrees?
Summers and winters in the United States would likely become warmer and colder, respectively.
Air masses formed over the Pacific Ocean are moved by prevailing westerlies where they encounter extensive north-south mountain ranges, such as the Sierra Nevada and the Cascades. Which statement best describes the changes that these air masses undergo?
The warm, moist Pacific air rises and cools, releasing precipitation as it moves up the windward side of the range, and this cool, now dry air mass heats up as it descends on the leeward side of the range.
Which of the following are important biotic factors that can affect the structure and organization of biological communities?
predation , competition
In temperate lakes, the surface water is replenished with nutrients during turnovers that occur in the
autumn and spring
Which of the following causes Earth's seasons?
the tilt of earth's axis
Which of the following environmental features might influence microclimates?
all of above
Sets with similar terms