VARIOUS GROUP OPTIONS. “This may involve reproductive organisations that synchronise the transmission of information across generations (e.g. vertical transmission of symbionts; compartmentalisation of replicators; or linkage of replicating molecules into chromosomes), or restrict the channels of communication (e.g., bottle-necked life-cycle, germ-soma separation).”
http://link.springer.com/article/10.1007/s11692-015-9358-z