1.Life emerged on earth about 3.8 billion years ago, but sex did not evolve until more than 2 billion years later. Dirty limericks emerged only quite recently, geologically speaking.
2. Sex—what is it good for? Scientists are not sure, since asexual reproduction is a better evolutionary strategy in some important ways.
3. For those who refuse to commit to one strategy: The hermaphroditic earthworm Dendrobaena
2. Sex—what is it good for? Scientists are not sure, since asexual reproduction is a better evolutionary strategy in some important ways.
3. For those who refuse to commit to one strategy: The hermaphroditic earthworm Dendrobaena