This is a preview. Log in through your library . Abstract Studies of reproductive structures are important in understanding developmental processes and taxonomic and phylogenetic relationships of ...

Human embryo development and early organ formation remain largely unexplored due to ethical issues surrounding the use of embryos for research as well as limited availability of materials to study.

In plants, it has been clear for a while that maternal signals regulate embryo development. However, the signal itself was unknown -- until now. Plant scientists have now found that a plant hormone ...