Ch. 53 & 54 Flashcards
An oak tree produces thousands of acorns but very few grow into mature oak trees. The oak tree exhibits a ____ survivorship curve
Type 3
Chimpanzees have a relatively low birth rate. They care for their young and most love a long life. The chimp survivorship curve would look like ______
A relatively flat line that drops steeply at the end
Which of the following describes he distribution of survivorship or mortality for a population that has type 2 survivorship
The chance of death is roughly constant over all ages
A population will always grow exponentially if
There are no limiting factors
Which of the following probably exhibits exponential growth
Fruit flies that just colonized an island previously inhabited only by fruit bearing plants
No population can grow indefinitely. The ultimate size of any population is limited by
The carrying capacity of its environment
A populations carrying capacity
May change as environmental conditions change
Assuming that r has a positive value in the formula G=rN(K-N/K). If N=K then he population will
Remain stable at the carrying capacity.
Analyzing ecological footprints reveals that
The ecological footprint of the United States is large because per capita resource use is high
Which one of he following would most likely be an example of a density independent factor limiting population growth
Environmental temperature extremes
Which one of the following is most likely a density dependent growth regulator of animal populations
Number o shelter sites
What type of population interaction between species benefits neither population
Competition
When goats were introduced to an island off the California coast, he goats inhabited the same areas and ate the same plants as the native deer. The deer population dwindled and finally disappeared. This is an example of
Competitive exclusion
Flounder is a type of fish that looks like the sea floor. This is an example of
Cryptic coloration
The flower fly resembles a honeybee but the flower fly has no stinger. This is an example of
Bayesian mimicry
The poison arrow frogs dendrobates of tropical America are all brightly colored and often have very similar patterns. Each species is distasteful to predators and all possess toxic skin secretions. The adaptive relationship among these species is best termed
Mullerian mimicry
A leech that attached itself to a swimmer is an example of
Ectoparasite
Certain species of acacia trees have hollow thorns that house stinging ants, which Gaga know anything hay touches he tree. The ants feed on nutrients produced by the acacias. This is an example of
Mutualism
If the relationship between species A and B is described as commensalism, then this means that the population growth of
One species increases and the other is uneffected
Which of the following is an example of aposematic coloration
Stripes on a skunk
For populations that have type 1 survivorship, mortality _____ with age
Increases
For populations in which mortality is higher early in life, individuals typically begins reproduction at a relatively _____ age and produce _____ offspring
Younger
Many
Which of the following is and example of exploitative competition
Some trees in a forest grow taller than others to gain more access to direct sunlight
Organisms with k selected life history typically inhabit relatively _____ environments and their population growth is primarily affected by density _____ limiting factors
Stable
Dependent
Which of the following traits is often associated with r selected life histories
Smaller body size
