4.1 种群的特征 导学案
学习目标:
1.列举种群的特征。
2.尝试用样方法调查种群密度。
学习重点:
种群的特征。
一.导学过程:
(一)预习导学
1.种群
定义:______________________________________________________________________________
2.种群密度
(1)种群密度的定义:________________________________________________________________
(2)调查种群密度的方法:____________________________________________________________
3.出生率和死亡率
(1)概念:__________________________________________________________________________
(2)意义:__________________________________________________________________________
4.迁入率和迁出率
(1)概念:__________________________________________________________________________
(2)意义:__________________________________________________________________________
5.年龄组成
(1)概念:__________________________________________________________________________
(2)类型:
增长型:____________________________________________________________________________
稳定型:____________________________________________________________________________
衰退型:____________________________________________________________________________
(3)意义:__________________________________________________________________________
6.性别比例
(1)概念:__________________________________________________________________________