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bio test4

chapter 44

A group of interbreeding individuals occupying the same habitat at the same time is a(n) population.
You find a notebook that has lots of equations, tables, and graphs in it. The tables have columns for the number of female offspring born over a year, the number of deaths over a year, and the number of individuals in various age classes. What subject do demography; life tables
What is the simplest method to measure population density in a given area? Count the number of organisms.
A line transect would probably be the preferred method to quantify the population density of Ponderosa pines.
A mark-recapture program marked 10 individuals in the first catch. The second catch has a total of 8 individuals, 4 of which were recaptures. What is the estimate of total population size? 20
A good sampling method for quantifying the density of birds or bats is the use of mist nets.
In a growing population, the youngest age classes have the most individuals.
A survivorship curve with uniform death rates over time is most likely to be a type _______ curve. II
. A survivorship curve in which most individuals die late in life is a type _______ curve. I
Parasitism usually affects populations in a ____________ manner. density-dependent
. What information is used to calculate the age-specific fertility rate, mx? number of female offspring born to females within a reproductive age class
Population growth typically slows down when populations reach carrying capacity because resource limitation decreases birth rates.
A plot of population size vs time that displays a J-shape is indicative of exponential growth.
The per capita growth rate of a population is best defined as per capita birth rate minus per capita death rate.
Examine the figure above. What type of pattern does the human population exhibit through most of its history? logistic growth
World human population in 2012 was approximately 7 billion.
If the age structure of a country's population is evenly distributed, what prediction can confidently be made about the near future? the population will not increase rapidly.
What percentage of the population are under the age of 15 in West Africa? 50
Examine the figure above. In 2010, what age group(s) made up the largest proportion of the population of France? 35-64
You are studying with a classmate who asks you about the concept of a replacement rate. She wants to know what happens to a population if the replacement rate is reached? She assumes the average human replacement rate is 2.0. What would you tell her? When replacement rate is reached, the population is in equilibrium. The replacement rate is greater than 2.0 because some individuals die before they reproduce.
In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young (pre-reproductive) and the old (post-reproductive). What conclusion is best su Wolf predation is not dramatically reducing the sheep population.
. What total fertility rate would be most likely to cause the human population size to be 5 billion in the year 2100? Refer to Figure 4420 1.2
What is an example of a +/- interaction? predation
What is an example of a +/+ interaction? mutualism
The relationship of disease-causing organisms to an infected rabbit is one of A. parasitism. parasitism.
Scientists have discovered that when they provide supplemental food for hares, their density tripled. Based on the figure above, showing cycles of lynx and hare populations over a century's time, what do you predict would happen to a lynx population in a The lynx population would increase 1-2 years after the hares increased.
. In competition between P. caudatum and P. bursaria, neither species goes extinct because they utilize different resources. This can be considered as evidence for resource partitioning
You are studying the feeding habits of a group of four closely related bird species. You observe that all four species feed on insects. However, you notice that the species do not feed at the same time of day: one species feeds most actively at dawn, an resource partitioning
Several butterfly species that are edible to birds have very similar color patterns to the generally inedible monarch butterfly. This is best described as an example of what? Batesian mimicry
What form of coloration is shown by many seahorses? camouflage
Secondary metabolites are produced to deter herbivores.
The seeds of many plant species are dispersed by a harmless temporary attachment to an animal's fur or feathers. This form of dispersal can be classified as commensalism.
. If you were given the task of choosing a biological control agent for a reed from China that has become invasive in the southeastern U.S., what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be rel A fungal pathogen from China that is only known to infect the Chinese reed and can kill a plant in a few months.
Gopher tortoises regularly abandon their burrows and build new ones to accomadate their changing size and food requirements. The eastern indigo snake often makes its home in these abandoned burrows. How would you characterize this relationship and its eff commensalism: indigo snake +, gopher tortoise 0
Created by: Susyam



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