Mastering Biology Chapter 53 Population Ecology

Which of these species typically has a mortality rate that remains fairly constant over an individual's life span? robins elephants grasses humans oysters

Oyster populations are primarily, if not exclusively, composed of _____. adults prereproductive oysters larvae juveniles larval and juvenile oysters

Which of these organisms has a survivorship curve similar to that of oysters? elephants robins cats grasses humans

Which of these organisms has a survivorship curve similar to that of humans? elephants cats grasses oysters robins

Which of these was the first of the major events that stimulated an increase in the size of the human population? the discovery of antibiotics the bubonic plague the Industrial Revolution the discovery of vaccines the advent of agriculture

Which of these was the second of the major events that stimulated an increase in the size of the human population? the discovery of antibiotics the advent of agriculture the discovery of vaccines the bubonic plague the Industrial Revolution

Which of these was the third of the major events that stimulated an increase in the size of the human population? the Industrial Revolution the discovery of vaccines and the discovery of antibiotics the discovery of antibiotics the advent of agriculture the discovery of vaccines

Currently, how large is the worldwide population of humans relative to Earth's carrying capacity for humans? There is insufficient information to answer this question. either at or above the carrying capacity above the carrying capacity below the carrying capacity at the carrying capacity

Interpret the Data: Comparing Population Age-Structure Graphs Look at the age-structure pyramids. The numbers between the bars (in the middle of the graphs) serve as the y-axis. What do these numbers represent? the population of males and females the age classes, in 5-year ranges the total population, in millions the number of people born in a particular year the percentage of the population in each age class

What do the bars on the graphs represent? the number of males and females born in different years the percentage of males and females in each age group the number of males and females in each age group birth rate or death rate for each age group

In 2010, how many 25- to 29-year-old women lived in Niger? about 0.5 million about 1.0 million about 1.2 million about 0.5 billion cannot be determined from the graph

The colors of the bars on the graphs indicate the life stage of the people in that age class. What does it mean if a bar is colored blue? The people in that age class are past reproductive age. The answer cannot be determined from the graphs. The people in that age class have not yet reached reproductive age. The people in that age class are of reproductive age.

The 2010 age-structure pyramid for Niger indicates that the population of Niger ________. was increasing was stable was decreasing cannot be determined from the graph

In Canada in 2010, which age classes contained the largest number of people? children between 5 and 14 adults between 25 and 34 adults between 35 and 45 adults between 45 and 54 adults between 55 and 64

In Canada in 2010, people between the ages of 45 and 54 made up the largest percentage of the population. What factor is most likely to have caused this bulge in the age pyramid? an increase in the death rate during World War I and the influenza epidemic of 1917 the increased availability of oral contraceptives in the 1950s and 1960s a surge in the birth rate after World War II ended in 1945 a decline in the birth rate during the Great Depression of the 1930s

Assuming that current trends continue, predict how the age structure of Canada in 2030 will likely differ from that in 2010. The proportion of the population made up of children (ages 0-15) will increase. The proportion of the population made up of adults of reproductive age will increase. The proportion of the population made up of older adults (65+) will increase. The answer cannot be determined from the graph.

Based on a comparison of the age-structure pyramids, which of the following would likely be a higher priority in Canada than in Niger? providing prenatal care providing childhood vaccinations providing long-term care for the elderly building new schools