Angiosperms Flashcards
what do phylogenetic trees show?
evolutionary history and current relationships, inferred using modern analytical tools
what do we assume about mutations?
that theyre fixed at different rates, using this grade of change we can look at relationships between species and date when things diverged
life cycle of an angiosperm?
anther produces pollen
transferred to stigma where in develops into a pollen tube carrying two sperm
one fertilises the nucleus producing the zygote
the other triggers the endosperm
what is special about the endosperm?
only lasts while theres a seed - source of nutrition
difference between mono and dicots in terms of seeds?
monocots had one initial seed
dicots had two
whats special about nomenclature of plants?
includes reference to the author
strict regulation
when did photosynthesis originate?
2bya
when did eukaryotes originate?
1.5-0.9 bya
when did land and flowering plants originate?
438mya
246-144mya
what else is included in plant book collections?
dried ones, finder and where it was collected
what does the fibonacci sequence have to do with flowers
why flower petals occur in 3, 4, 5s
optimal packing