Sökning: "embryologi"
Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet embryologi.
1. Ontogeny and Population Biology of a Sex-Limited Colour Polymorphism
Sammanfattning : This study has involved investigation of number of populations of the damselfly Ischnura elegans over several years, looking at frequency changes over time, morphological differences between the sexes and the morphs, differences in growth rate and development time, differences in fecundity between the morphs, and genetic differentiation between populations. I. LÄS MER
2. The balance between sex and asex: evolutionary genetic studies of reproductive variation in Allium vineale
Sammanfattning : Evolutionary theory predicts a disadvantage to sexual reproduction. This manifests itself either by the higher growth rate of asexual females in a dioecious species, or by the higher transmission rate of a gene conferring asexual female function to its carriers in a hermaphrodite species. LÄS MER
3. Morphogenesis and functional anatomy of the ovule in broad bean (Vicia faba L.)
Sammanfattning : .... LÄS MER
4. The role of polysaccharide modifications during Drosophila development
Sammanfattning : Glucosides attached to proteins and lipids have been shown to modulate the activity of signal transduction pathways regulating growth and patterning processes during animal development. In particular, O-linked glycans such as glycosaminoglycans (GAGs) have been implicated in modulation of growth factor signaling pathways. LÄS MER
5. Trilobites from the Middle and Upper Ordovician Andersön Shale Formation in Jämtland and the equivalent Killeröd Formation in Skåne, Sweden
Sammanfattning : Trilobites from the Middle and Upper Ordovician Andersön Shale Formation in Jämtland, central Sweden, and the Middle Ordovician Killeröd Formation in Skåne (Scania), southern Sweden, are revised and discussed. These formations have several genera and a few species in common, e.g. LÄS MER