Population Attributes - Birth Rate, Death Rate, Age Pyramid - Unsolved Practice Set
Chapter: Organisms and Populations | Topic: Population Attributes Birth Rate Death Rate Age Pyramid
POPULATION ATTRIBUTES - BIRTH RATE, DEATH RATE, AGE PYRAMID - UNSOLVED PRACTICE SET
Topic: Population Attributes Birth Rate Death Rate Age Pyramid
Multiple Choice Questions
Q1. Population density refers to:
- The total number of species found in an ecosystem
- The number of individuals of a particular species present per unit area or volume
- The rate at which individuals are born
- The rate at which individuals die
Q2. Natality, or birth rate, in population ecology refers to:
- The number of deaths occurring in a population over a given time period
- The number of births occurring in a population over a given time period
- The movement of individuals into a population
- The movement of individuals out of a population
Q3. An age pyramid that is broad at the base and narrows sharply toward the top typically represents a population that is:
- Declining in size
- Expanding/growing rapidly
- Completely stable, with no change
- Extinct
Q4. A stable age pyramid, with roughly equal proportions across most age groups, typically represents a population whose size is:
- Rapidly increasing
- Remaining relatively constant over time
- Rapidly decreasing
- Composed only of older individuals
Q5. Sex ratio, as a population attribute, refers to:
- The total population density
- The relative proportion of males to females in a population
- The rate of migration into a population
- The age at which individuals reproduce
Short Answer Questions
Q6. Define population density, and explain why it is considered an important population attribute.
Q7. Differentiate between natality (birth rate) and mortality (death rate).
Q8. What is an age pyramid, and what information does it provide about a population?
Q9. Describe the typical shape of an age pyramid representing a rapidly expanding population.
Long Answer Questions
Q10. Discuss the key attributes of a population - density, natality, mortality, and sex ratio - explaining why each is important for understanding population dynamics.
Q11. Explain how age pyramids can be used to represent and interpret whether a population is expanding, stable, or declining.
APPLICATION / ANALYSIS
Q12. A wildlife biologist studying a population of deer in a forest finds a very high proportion of young individuals and relatively few older adults, resulting in a broad-based age pyramid. Based on this age structure, predict whether this population is likely to be expanding or declining, and explain your reasoning.
Q13. In a particular year, a population of 1,000 rabbits experiences 150 births and 50 deaths, with no migration in or out. Calculate the net change in population size for that year, and explain what this indicates about the population's growth trend.