2.3 bio Flashcards
1
Q
Stage 1
A
GR- high
DR- high
With stable or slow increase
2
Q
Stage 2
A
BR- high
DR- falls rapidly
With rapid increase
3
Q
Stage 3
A
BR- falling
DR- falls more slowly
With increase slowing down
4
Q
Stage 4
A
BR- low
DR- low
With falling then stable
5
Q
Stage 5
A
BR- yet to be seen
DR- low
With little change
6
Q
Sex ratio
A
Number of females vs males
7
Q
Generation time
A
Age that females reproduce
8
Q
Age structure
A
Number of females at reproduction age in cohart
9
Q
Concerns of population growth (increasing)
A
- extraction of resources
- burning fossil fuels
- fresh water use
- forests (other habitats)
- fishing and hunting
- transport of invasive species
- transmission of diseases
10
Q
How an age structure diagram can be used to predict population growth
A
How big the population is from age 0-45, especially about 29-45 (reproductive age) using the population period graph, you can see males compared to females.
11
Q
A
