exam 6 Flashcards
studying
What is a common trait of k-selected species in terms of offspring?
produce a small number of offspring with a high investment in each
The figure included shows the body temperature of lizards versus air temperature… best supported by data
body temperature of lizards is more constant in open than in shaded forest habitats
A small group of mice released on island…How would you describe situation?
new population size is a result of density-independent regulation
What are population pyramids used to show?
age composition of a population
Organisms such as lizards that need to maintain body temperature through external means do so by
sunbathing
An unscrupulous dog breeder has been selecting for dogs…Why might this strategy be counterproductive?
The puppies from large litters are likely to be malnourished, and the mother will have few resources to devote to future litters
What is a key difference in the assumptions made by….regarding environmental resources?
logistic assumes resources are limited, while exponetial assumes they are unlimited
Many times species are composed of networks of distinct…When do metapopulations occur?
When suitable habitat is patchily distributed and separated by areas of unsuitable habitat
What is a characteristic feature of r-selected species?
high reproductive rate
The size at which population stabilizes in a…for what species?
carrying capacity
Relationship in which both members benefit is called
mutualism
Alligators excavate holes in the bottom of bodies…alligators can be classified as an?
keystone species
Which statement correctly interprets graph?
Paramecium caudatum and Paramecium aurelia are able to compete for the same resource and their population densities are not affected
Competition shapes communities because there are usually limited
resources
In __ mimicry, unprotected species resemble others that are distasteful
Bastian
The difference in fundamental niche and the realized niche is
fundamental niche is the entire niche that a species is capable of using while the realized niche is just what is being occupied
Which of following is example of commensalism?
barnacles hitching a ride of the skin of whale
Resource partitioning can often be seen in similar species that…other resources and are called __species
sympatric
The way in which organism utilizes environment may be called
its niche
Lakes become eutrophic by
accumulation of organic matter
The great deserts and associated arid areas…continents at about
30° north and south latitude
Which of following marine ecosystems would be expected…primary production per unit area?
oligotrophic oceans
The relatively shallow part of ocean extending…continental shelf is called
neritic zone
A mountain range along the coast of continent is located perpendicular…where rain shadow is located?
leeward side of the mountain where cool, dry air is descending
Biomes are broad regional areas defined flora and fauna…precipitation versus temperature?
Tropical Rain forest = 1; Desert = 2; Tundra = 3; Grassland = 4
Prairie is another name for a
temperate grassland
CO2 and other gases, which absorb the longer wavelengths…responsible for causing the
greenhouse effect
Destruction of which biome would result in greatest loss of biodiversity?
tropical rain forest
Periodic disturbances of Pacific currents that cause global weather changes are given name
El Nino
If the energy of the sun no longer reached earth…ecosystems would be least affected?
deep sea hydrothermal vent
