Biology 115 (chapter14) – Flashcards

Unlock all answers in this set

Unlock answers
question
Ecology is best defined as the study of:
answer
The relationships between all living organisms and their environments.
question
On average, which leaves more offspring that survive to become adults and reproduce: a pair of elephants or a pair of rabbits?
answer
If both populations are stable, the pair of elephants and the pair of rabbits will leave the same number of offspring that survive to become adults and reproduce.
question
In a population exhibiting logistic growth, the rate of population growth is greatest when N is:
answer
0.5K
question
In a population, as N approaches K, the logistic growth equation predicts that:
answer
The growth rate will approach zero.
question
The number of individuals that can be supported in a given habitat is the:
answer
None of the above: innate capacity for increase, biotic potential, density-dependant, or density-independant
question
Which of the following statements about maximum sustainable yield is incorrect?
answer
The maximum sistainable yield for a population is a useful management guideline for harvesting plant products such as timber, but is not helpful for managing animal populations.
question
Dr. David Reznick has studied life history evolution in guppies that live in stream in Trinidad. Guppies are found in two different types of habitat: sites where predation is high, and sites where predation is low. Which of the following life history characteristics would you expect to evolve in a guppy population living in a high-predation site?
answer
Increased egg number
question
The death rate of organisms in a population exhibiting a type III survivorship curve is:
answer
Lower after the organisms survive beyond the earliest age groups.
question
Which of the following is a major tradeoff in life histories?
answer
Growth for reproduction
question
Natural Selection:
answer
Cannot weed out from a population any alleles that do not reduce an individual's relative reproductive success, even if these alleles increase an individual's risk of dying.
question
Which of the following statements about the hazard factor of a population is incorrect?
answer
It is a measure of how quickly the individuals in a population age.
question
Life extension:
answer
Has been acheived using labratory selection for delayed reproduction.
question
A population pyramid:
answer
Represents the number of individuals in various age groups in a population.
question
A primary difference between the age pyramids of industrialized and developing countries is that:
answer
In developing countries, much larger proportions of the population are in the youngest age groups.
question
Which statement best describes expectationbs for the world's human population by the year 2010?
answer
It will exceed 7 billion if the current rat eof increase continues.
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New