1
Q
null vs alternative hypothesis
A
null-has no effect, same as to begin with
alternative-supports prediction
2
Q
heritable triat
A
trait that increasees bio fitness. traits that are passed down
3
Q
bio fitness
A
ability to produce viable offspirng (most children)
4
Q
3 types of adaptations
A
- structural (appearance)
2.physiological (function) - behaivour (activities)
5
Q
jean baptists lamarck
A
said that changes occur in individuals eg)giraffe extending neck and getting longer
changed overtime
6
Q
darwins theory
A
changes do not occur in individuals. heritable characteristics dont change in natural selection
7
Q
natural selection needs (3)
A
1.heritable trait
2.variation
3. fitness conseqeunce
8
Q
4 constraints of adaptations
A
- compromise
- sonstrained by histroy (ancestral traits)
- enviornments often change
4.natural selection acts on existing variation
9
Q
is variation pre-existing
A
no occurs due to mutations, mating, dispersal etc.
