[简答题]种群的年龄结构(age structure)

[判断题]通常死亡率是不会随年龄组不同而变化的，所以种群年龄结构与种群动态有很大的关系。( )

[填空题]种群年龄结构是指不同年龄组的个体在种群内的______或配置状态。

[简答题]简述种群年龄结构的含义及其基本类型。

[判断题]年龄结构为增长型的种群，其年龄锥体的形状为中间宽上下窄。（）

[单项选择]种群的年龄结构是指______。
A. 生物个体的年龄大小
B. 种群的年龄平均值
C. 种群中各年龄段个体所占比例
D. 种群中个体的年龄范围

[简答题]简述种群的年龄结构的三个基本类型的特点。

[单项选择]一个种群的年龄锥体呈下宽上窄的金字塔形，则该种类的年龄结构属于（）
A. 稳定型 
B. 增长型 
C. 衰退型 
D. 混合型

[填空题]种群年龄结构可分为______、稳定型和衰退型三种类型。

[填空题] Age Structures in Mexico and Sweden
Age structure refers to the percentage of the population in different age
(1) ______Mexico’s age structure is quite different from Sweden’s in (1) ______
that the former is like a (2) ______with a wider base. In Sweden, the age (2) ______
structure is shaped like a rectangle, which results from a(n) (3) ______ (3) ______
birth rate and low death rate in early and middle age. In Mexico, the
population is expanding rapidly. In Sweden, the population is stable in size
with a(n) (4) ______distribution. (4) ______
The Effects of Different Age Structures..
—Age structures affects population growth:
a) A country with a larger percentage of people at the bottom of the
pyramid will have a (5) ______population growth rate. (5) ______
b) a larger proportion of women of (6) ______age results in a faster (6) ______
population growth.