BISC 121Lg Lecture Notes - Lecture 26: Bristlecone Pine, Taxus Brevifolia, Taxus Baccata
Document Summary
Reduced gametophytes of seed plants develop in the walls of the spore. Ovule has a megasporangium, megaspore, and at least one, but sometimes more than one protective integuments. Ephedra- ephedrine can be extracted and is a precursor for crystal meth as well as an appetite suppressant. Douglas fir provides most of north american lumbar. Bristlecone pine- may be the oldest living tree. Angiosperms are flowering plants: flower and fruit, most diverse, flowers are made for sexual reproduction. Carpels: fruit is the mature ovary. Some are meant to be eaten and pooped out (berries) Some have wings and can be dispersed by the wind: endosperm (3n) nourishes the embryo, 2 groups of angiosperms are the monocots and dicots. Magnoliids magnolias and black pepper plants, they are neither monocots nor dicots. Monocot characteristics: 1 cotyledon, parallel veins, one opening pollen grain, petals come in multiples of 3.
