B4 | natural selection & genetic modification Flashcards
1
Q
facts about ardi and lucy fossils
A
ardi lives in ethiopia 4.4 million years ago
lucy lived in ethiopia 3.2 million years ago
small, sloping forehead
prominent brow ridges
flat nose
significantly protruding jaw
lower jaw angled forwards
large teeth
2
Q
facts about turkana boy
A
lived in kenya 1.6 million years ago
slight, sloping forehead
smaller brow ridges
small protruding flat nose
smaller less protruding lower jaw
lower jaw angled down
smaller teeth
3
Q
advantages of using tissue culture in medical research
A
- ability to study effects of new medicines in isolation
- can produced a large number of cells which increases the sample size and improves the reliability of results
- no harm to animals/more ethical
- faster than sexual reproduction
- only need one parents to take tissue from which saves space
4
Q
ways to find the age of fossils
A
- how deep it is in the ground
- radiometric dating
