6.6-who even knows anymore-geography? Flashcards
1
Q
what is the competitive exclusion principle?
A
2 species compete, the winning one drives the other one to die out or move.
2
Q
what are some likely causes of variation in organisms apparently?
A
environment genes and environment many genes/polygenic age (example of a bio mark scheme being silly)
3
Q
what’s one way genetic diversity can be measured?
A
genetic polymorphism/proportion of heterozygotes/proportion of gene variants.
4
Q
for 2 marks, explain why a genetic bottleneck can lead to a low genetic diversity.
A
many alleles lost when population dropped
modern population descended from a few survivors.
