Human vs.________
# of differences in the amino acid sequence
Rhesus monkey
1
Horse 8
Donkey
10
Common zebra 11
Pig, cow, sheep 9
Dog
11
Gray whale 10
Rabbit
8
Kangaroo
10
Chicken, turkey 13
Penguin
14
Pekin duck 11
Snapping turtle 15
Rattlesnake
15
Bullfrog
18
Tuna
20
Screwfly fly 27
Silkworm moth 31
Tomato horn worm 31
Wheat
43
Rice
42
Baker’s Yeast 43
Candida Yeast 57
Neurospora
48
1.05 Reflection summary

When scientists say that living organisms share a universal genetic code it means that the same genetic code that is used by humans is used in every other type of organism too. Anything from plants to animals to bacteria uses the same genetic code. The universal genetic code relates to the hypothesis about the origin of life on earth because the genetic code is universal – that it is shared by all life forms on earth
- suggests that life evolved once and only once and that all contemporary life forms descended from that same ancestor. Most hypotheses about the origin of life on earth state that it arose from inanimate matter. Now, the nucleases that make up RNA can be built out of the containments of the primordial soup. The key step to life is a molecule that can rebuild itself. And as we know, RNA-polymerase consists mostly of RNA. These facts indicated that a world must've existed once, where the role of proteins was also taken by RNA molecules. But this set aside, the essential part is that RNA can be built from ingredients of the