cells625
species584
dna543
protein484
gene476
genes460
proteins430
fig389
membrane355
rna349
organisms326
genetic321
bacteria318
molecular317
acid313
evolution302
cell298
molecules287
plants277
enzyme268
biology266
amino253
enzymes249
tissue243
atp238
chromosomes229
acids229
glucose222
chromosome222
genome212
amino acids206
carbon205
biol205
molecule204
oxygen203
organism203
que201
growth201
mrna199
chemical197
evolutionary197
humans195
disease184
plant184
receptor181
nucleus180
animals175
mammals173
biological172
fungi169
por163
entre162
receptors161
electron161
populations160
sequence159
para158
tissues155
como155
reproductive149
del147
sperm147
hormone147
meiosis145
alleles145
cycle145
allele144
eukaryotic139
una138
birds137
que se134
analysis133
cellular128
min126
selection125
synthesis124
embryo123
binding122
nutrients121
hormones120
reproduction120
mutations120
insects116
offspring116
amino acid116
sequences115
population115
diversity113
buffer113
membranes113
ions112
bacterial111
neurons109
co2109
hydrogen107
viruses107
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