A group of organisms of one species occupying a geographical location at the same time is a A. population. |
population. |
The physical location where an organism lives is termed its A. home boundary. |
habitat. |
All of the organisms in a given location or area are termed a A. peer group. |
community. |
The study of the relationships among organisms and the environment is A. ethology. |
ecology. |
The number of individuals of a species per unit area or volume of habitat is A. carrying capacity. |
population density. |
The number of new individuals produced per unit time in a population is its A. immigration rate. |
birth rate. |
The number of individuals that die in a population per unit time is its A. immigration rate. |
death rate. |
A population age structure diagram depicting an equal number of individuals in each age group suggests that the population is A. stable. |
stable. |
In a survivorship curve, a type I species, like a human or elephant, is a species that A. has an equal probability of dying at any age. |
has the highest probability of dying as it reaches its maximum life span. |
In a survivorship curve, a type II species, like a song bird, is a species that A. has an equal probability of dying at any age. |
has an equal probability of dying at any age. |
In a survivorship curve, a type III species, like most insects and plants, is a species that A. has an equal probability of dying at any age. |
has the highest probability of dying at a very young age. |
The maximum number of individuals that a habitat can support indefinitely is the habitat’s A. density dispersion. |
carrying capacity. |
In regards to a species’ life history, opportunistic species A. are long lived. |
produce many offspring. |
In regards to a species’ life history, equilibrium species A. have only a few offspring. |
have only a few offspring. |
A human population with a large percentage of pre-reproductive individuals A. is common in less-developed countries and will most likely increase in size. |
is common in less-developed countries and will most likely increase in size. |
A human population with a large percentage of post-reproductive individuals A. is common in less-developed countries and will most likely increase in size. |
is common in more-developed countries and will most likely decrease in size. |
Predation of deer by wolves is an example of a A. density-independent limit. |
density-dependent limit. |
An example of a density-independent factor that affects a population’s growth is A. insects eating your tomato plants. |
frost killing all of your tomato plants. |
In 2010, India had a population of 1,170,000,000, a birth rate of 0.027, and a death rate of 0.013. What was the growth rate of India’s population? A. 0.027 |
0.014 |
In 2010, India had a population of 1,170,000,000, a birth rate of 0.027, and a death rate of 0.013. Approximately how much did the Indian population grow in 2010? A. 170,000,000 |
17,000,000 |
Based upon the age structure diagram, you expect the Indian population to A. shrink. |
grow and then stabilize. |
Which of the following best describes the link between survivorship curves and equilibrium species? A. Equilibrium species are limited by density-independent factors and have few offspring. |
Equilibrium species are limited by density-dependent factors and have few offspring. |
Which of the following best describes the link between survivorship curves and opportunistic species? A. Opportunistic species are limited by density-dependent factors and have few offspring. |
Opportunistic species are limited by density-independent factors and have many offspring. |
Researchers studying guppies in Trinidad found that guppies in streams with high predation reproduced earlier and more frequently. Which of the following is most important in driving the guppies to change their life history in face of predation? A. The guppies are an equilibrium species. |
The guppies are an opportunistic species. |
Why have human growth rates increased the most in developing countries in the past 50 years? A. Death rates have fallen more slowly than birth rates. |
Death rates have fallen faster than birth rates. |
Why are the leading causes of human death in high-income countries heart disease, stroke, and cancer, while in low-income countries infectious diseases are the leading causes of death? A. High-income countries have sedentary life habits, excess food resources, and longer life expectancies. |
High-income countries have sedentary life habits, excess food resources, and longer life expectancies. |
A country’s ecological footprint can be calculated by multiplying its population size by the footprint of each individual. Why are some ecologists concerned about the ecological footprint of a country like India? A. Its population is increasing. |
Both its population and standard of living are increasing. |
In the section "Investigating Life: Let Your Love Light Shine", a firefly flashing a light to attract a mate may also attract predators. The observation that animals take this risk to find a mate is consistent with which definition of natural selection? A. reproduction of the fittest |
reproduction of the fittest. |
In the section "Investigating Life: Let Your Love Light Shine", a male places a protein-rich packet of sperm called a spermatophore into the female’s reproductive tract during mating. The spermatophore fertilizes the female and provides food for the eggs. Which of the following is a selective advantage for females? A. choosing a male who produces a lot of sperm |
choosing a male with a large spermatophore. |
In the section "Investigating Life: Let Your Love Light Shine", what hypothesis did the scientists test? A. The frequency of a male’s flashes indicates how healthy he is. |
A male’s flashes correlate with the size of his spermatophore. |
In the section "Investigating Life: Let Your Love Light Shine", what correlation did the scientists observe in part a of the figure? A. The longer the flash duration, the larger the size of the spermatophore. |
The longer the flash duration, the larger the size of the spermatophore. |
In the section "Investigating Life: Let Your Love Light Shine", what correlation did the scientists observe in part b of the figure? A. Females preferred males who flashed for 80 msec. |
Females preferred males who flashed for 108 msec. |
In the section "Investigating Life: Let Your Love Light Shine", how did the scientists obtain the different frequencies of flashes part b of the figure? A. They trained male fireflies to flash for a given duration. |
They made an artificial male firefly. |
In the section "Investigating Life: Let Your Love Light Shine", what did the scientists propose to explain why females did not prefer males with longer duration flashes? A. The males produced spermatophores too large in size. |
They were similar to those from predatory fireflies. |
When exponential growth is plotted over time an S-shaped curve emerges. True False |
False |
When exponential growth is plotted over time a J-shaped curve emerges. True False |
True |
The maximum number of individuals of a population that a habitat can support indefinitely is its carrying capacity. True False |
True |
Governments of France, Canada, and China offer financial incentives to encourage citizens to have children. True False |
False |
The United Nations has estimated (for the high estimate) that the world’s human population may reach about 10.5 billion by the year 2050 and will continue to increase. True False |
True |
Conditions whose growth-limiting effects increase as a population grows are density-independent factors. True False |
False |
Which of the following organisms is an example of an opportunistic species? A. dolphins |
rabbits |
Which of the following organisms is an example of an equilibrium species? A. cats |
whales |
Ecologists study A. prokaryotes only. |
interactions between all organisms. |
Which of the following is NOT within the study of ecology? A. spread of disease |
bonds of DNA |
Which of the following is an example of an aquatic ecosystem? A. fishes, snails, crabs, water, and salinity |
fishes, snails, crabs, water, and salinity |
Which of the following is an example of an aquatic community? A. fishes, snails, crabs, water, and salinity |
fishes, snails, and crabs only |
Which of the following are biotic components? A. trees, birds, insects, rainfall, and sunlight |
trees, birds, and insects only |
Which of the following are abiotic components? A. trees, birds, insects, rainfall, and sunlight |
rainfall and sunlight only |
Oysters and many other mollusks produce many offspring of which only a few survive to adulthood and then have little risk of predation with their strong adult shells. Oysters are an example of an organism with a type ______ survivorship curve. A. 0 |
III |
Hydra, a type of cnidarian, have equal survival rates through life because they are equally fit at all stages. Hydra are an example of an organism with a type ______ survivorship curve. A. 0 |
II |
Biology Final ch.18
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