Why aren't animals diverse in phenotype?
20470
Why do different humans look different?
112074
A book where 2-dimensional species evolved on rapidly changing environment
150434
Any evolutionary explanation for human blood groups?
151587
Are there in-universe explanations for how some species' appearances change between series?
4404
Can any species produce a Force-Sensitive?
38444
Can any animals photosynthesize?
95330
Why are there so many medicinal plants?
16668
Why aren't alien planets as varied in climate as the Earth?
15250
Why do some bad traits evolve, and good ones don't?
49673
How many organisms have ever lived on Earth?
110965
Compatibility of races
147907
Is *race* a synonym of *species* or is just a common mistake?
29772
How is uniq not unique enough that there is also uniq --unique?
128681
Is the Xenomorph life cycle based on the life cycle of a real world species?
6594
Since RNA viruses and retroviruses all have high mutation rates, why do only a few viruses have the virtue of variability?
122255
What instances are there in which two species share the same binomial name?
45077
Do animals other than humans have different blood types?