(3 points) Adding age-structure to population growth models has which of the fol

Question

(3 points) Adding age-structure to population growth models has which of the following effects predicted dynamics of populations: 2. a. Age-structured populations reach a constant population size; b. Age-structured populations are less likely to go extinct; c. Age-structured populations have lower population growth rates d. After disturbances, age- e. Age-structured populations will never reach a constant population growth rate structured populations will show variations in population growth rates; 3. (5 points) Stable Age Distribution means a. There are more young animals than old animals in a population; b. The population has reached a constant population size c. The population returns to its equilibrium size following a disturbance; d. The proportions of each age class in the population are constant from one generation e. Each age class has the same relative abundance

Explanation / Answer

Question 1

When Age structure is applied to population growth, it shows whether the population is increasing or decreasing or stable population growth.

First statement age structured population reach a constant population size depends on the prereproductive population i.e 0-14 years and post reproductive population i.e 45+ yeaes

Second statement it is true that age structured populations are less likely exitinct. There is a condition of declined population but not extinct.

Third statement age structured populations has not only low population growth rate but also high population growth rate and stable growtg rate

Fourth statement is true disturbances causes variations in the population size.

Fifth statement there is possibility to reach stable population size if birth rate and death rates are equal.

Question 2

First statement is false there is equal young and old population in stable growth rate

Second statement is true, the population reaches a constant population size as birth rate and death are same.

Third statement applicable in some circumstances, attaining equilibrium size after epidemic diseases like cholera, ebola etc. Natural disasters like earthquake and tsunami causes great human loss irrespective of the age.

The proportion of each age class are constant. it shows a bell shaped pyramid for stable population.

Each age class has same relative abundance in stable growth population.

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.