DNA evidence

Question 1

what is shared between all species on earth

Answer 1

the basic structure of DNA and proteins is identical

Question 1

what does the sequence of amino acids in a protein show

Answer 1

the evolutionary relationship between different species, once two species diverege in changes the amino acids in the long change and therefore the more similar the proteins the more closeley reelated the species

Question 2

what do dna sequences in animals show

Answer 2

species that share a comon ancestor will have inherited that ancestors dna sequence and therefore the more alike the DNA sequence is the more closely related the species are

Question 3

what is the problem with selective breediing

Answer 3

over many generations wild traits in animals are lost and the species becomes more domesticated and dependant of humans for survival

Question 4

what is artificial selection

Answer 4

when humans breeed organisms that have desirable traits, increasing the liklihood of the trait occuring in the next generation