Evolutionary Biology Flashcards
1
Q
Equation for population growth?
A
Ne=Noe^r.t
Where r is the Malthusian constant (births/deaths per unit time)
2
Q
What is K?
A
The environments carrying capacity
3
Q
What are birth and death rates dependent on?
A
Density and K
4
Q
What is fitness?
A
Different traits interact to determine
5
Q
Types of selection and the graphs
A
Directional - shift in one direction
Stabilising - favours an average
Disruptive - favours two extremes
Frequency-dependent
6
Q
Why can selection sometimes not change a trait between generations?
A
Is it’s not at least partially heritable
