This is a preview. Log in through your library . Abstract The genetic basis for gosling dimorphism in A. rossii has been investigated. Data from 233 recorded families support the hypothesis that the ...

THE phenomenon of sexual polymorphism of zooids in cheilostomatous polyzoa is well known but not widespread, and so far only a few families are known to contain species whose zooids are modified ...

The extensive sequence variation in most surface antigens of Plasmodium falciparum is one of the major factors why clinical immunity to malaria develops only after repeated infections with the same ...