Earth & Environmental Sciences
coevolution
96%
cyanobacterium
71%
assimilation
68%
alga
63%
nitrogen
45%
ocean
44%
fixation
29%
Archean
28%
enzyme
24%
prokaryote
18%
metazoan
18%
transition element
18%
eukaryote
18%
oxygenation
17%
biosphere
15%
explosion
14%
deep sea
14%
denitrification
13%
regulation
10%
productivity
10%
oxidation
10%
nutrient
10%
demand
9%
biomass
9%
ecosystem
9%
history
8%
rate
5%
Agriculture & Biology
coevolution
84%
oceans
81%
assimilation (physiology)
71%
Cyanobacteria
68%
algae
61%
metals
57%
nitrogen
44%
transition elements
20%
biosphere
18%
denitrification
18%
explosions
17%
prokaryotic cells
16%
chemistry
13%
enzymes
13%
eukaryotic cells
13%
history
11%
ecosystems
11%
oxidation
11%
uptake mechanisms
10%
biomass
9%
nutrients
9%
Medicine & Life Sciences
Cyanobacteria
100%
Oceans and Seas
88%
Nitrogen
75%
Metals
66%
Nitrogen Fixation
39%
Denitrification
21%
Biological Evolution
20%
Biomass
15%
Explosions
15%
Ecosystem
14%
Enzymes
14%
Vulnerable Populations
13%
Eukaryota
13%
Nutrients
10%
Molecular Biology
10%
History
9%
Equipment and Supplies
7%