Natural Selection Flashcards
1
Q
Three types of adaptation
A
Anatomical
Behavioural
Physiological
2
Q
What does endemic mean?
A
Species only found in one specific location
3
Q
How does genetic variation occur within a population?
A
Meiosis Crossing over of chromatids/chromosomes Random assortment of alleles Random fertilisation Random generic mutations
4
Q
What has to occur to bring about adaptation in a population?
A
Introduction of a selection pressure:
Change of habitat
New competition/predator
Random genetic mutations which produce advantageous alleles which mean the animal is more likely to survive and pass on it’s alleles
5
Q
What is the definition of a species?
A
Individuals that can interbreed to produce fertile offspring
6
Q
How are zoos used to preserve species?
A
Captive-breeding programmes to try and increase numbers
Preservation of genetic diversity
Re-introduce animals back into the wild
