I have another answser,If I am atheist I would said "the nature" defeat us in this issueI agree that it would be an interesting challange.
This is all hypothetical, but the only reason this couldn't work is if there is a non-material "force" that animates species and gives them life such as a "soul" or a form of consciousness. As a materialist, I would discount that possibility because I believe all forms of consciousness originate from matter organised in the brain. That is controversial and widely disputed for scientific and philosophical reasons. I think Abrahamic religion say only humans have souls (being made in gods image). So if that were true, it would only exclude humans.
Again- this is all "hypothetical", but I hope that answers your question.
a fly weight less than 1g had two genders (male/female),we can't make a similar to it despite the knowledge we reach,really shame on us