Compare all the organisms. What trend do you
see?
Relative Proportions (%) of Bases in DNA
Organism
А
T
G
С
Human
30.9
29.4
19.9
19.8
The proportions of DNA bases vary greatly
among organisms.
The proportions of DNA bases are similar in
closely related organisms, but different in
organisms that are not closely related
The proportions of DNA bases are similar
among all organisms.
Chicken
28.8
29.2
20.5
21.5
Grasshopper
29.3
29.3
20.5
20.7
Sea urchin
32.8
321
17.7
173
DO NE
Wheat
27.3
27.1
22.7
22.8
Yeast
31.3
32.9
18.7
17.1
का
E Coli
24.7
23.6
26.0
25.7
)