Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
population
|
group of individuals that belong to the same species
|
|
|
population size
|
total number of individuals in a population
|
|
|
population density
|
the number of individuals in a given area
|
|
|
population model
|
hypothetical population that attempts to exhibit key characteristics of a real population
|
|
|
exponential growth curve
|
J shaped curve showing the rapid increase in a growing pop.
|
|
|
carrying capacity
|
pop. size that an environment can sustain
|
|
|
density-dependent factor
|
Limited recources whose rates of depletion depend on the density of the population
|
|
|
logistic model
|
model of population growth that assumes finite recources levels limit population growth
|
|
|
density-independent factor
|
factors that effect the growth of a population
|
|
|
r-strategist
|
species characteristized by rapid growth, high fertility, short lifespan, and exponential population growth
|
|
|
k-strategist
|
species characteristiized by slow maturation, few young, slow population growth, and reproduction late in life
|
|
|
Hardy weinberg principle
|
prinicple
|
|
|
gene flow
|
movement of alleles in or out of a population
|
|
|
nonrandom matin
|
mating of individuals of the same phenotype, or who live close to eachother
|
|
|
genetic drift
|
random change in allele frequency
|
|
|
polygenic trait
|
characteristic of an organism that is influenced by many traits
|
|
|
normal distribution
|
bell shaped curve that results when the values of a trait are plotted
|
|
|
directional selection
|
natural selection that causes the frequency of a particular allele to move in one direction
|
|
|
stabilizing selection
|
type of natural selection in which the average form of the trait is favored and becomes more common
|
