Chapter 40_1
What is air expanding and cooling on the windward (western) side of the Cascades?
What is independent?
A brownish twig-like bug living in a forest on the small branches of a willow tree is a reasonable example of __
What is cryptic coloration?
The fossil record of this type of animal origins indicates that transitional forms of this type of animal had progressively specialized teeth.
What are mammals?
Name two biotic factors which can affect the structure and organization of biological communities.
What are predation and competition?
NOTE: Others include: herbivory, parasitism, mutualism, commensalism, disease/pathogens, etc.
When constructing a natural population growth curve, _____ is the variable on the x axis and ______ is the variable on the y axis.
What is time (x) and organism # (y)?
Biomanipulation through the ______ model can describe how adding tertiary consumers results in a decrease in secondary consumers.
What is top-down?
This effect of continental drift allows scientists to track the history of life on the planet.
An ecologist recorded 12 white-tailed deer per one square mile in one woodlot and 20 per one square mile in another woodlot. The ecologist was comparing _______ of deer
What is density?
A population of endangered elephants in a country is extremely low because of hunting. This country makes it illegal to hunt these elephants, which results in an increase of the elephant population. The population growth model will likely be _____
A series of gradual changes that occur after a disturbance describes __
What is ecological succession?
A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from the air-breathing organ (a simple lung) of an ancestral fish is an example of
This model is used to examine decreases in the rate of population growth as population size approaches carrying capacity.
What is the logistic growth model?
The maximum population size that any one particular environment can support is known as
What is the carrying capacity?
As we travel southward from the North Pole to the equator, species richness___
What is increases?
Many species of snakes lay eggs. However, in the forests of northern Minnesota where growing seasons are short, only live-bearing snake species are present. This trend towards species that perform live birth in a particular environment is an example of
This biotic factor causes populations to shift most quickly from an exponential to a logistic population growth model.
What is competition for resources?
When influenza spreads across the United States in highly populated areas such as New York City, this is a ______ factor which regulates the population.
What is density-dependent?
Bacteria which cause human diseases are known as __
What are pathogens?