BIOLOGY 1B Lecture Notes - Lecture 4: Archegonium, Megaspore, Sporophyte
Document Summary
Flowers a determinate ants= deferred a limited form of growth. Sterile organs: no larger hard flagellated gametes, 2) and have dep, archegonia released, gametes never free living and small, blank. Intermediate part that rests below stigma is called the style. The very bottom, the inflated part which is connected to stigma by style is the ovary. Inside ovary, will find one or six mega sporangia. These make spores, inside of each is a megaspore. Number of nuclei (things inside the cells): 8. Big nuclei down at the bottom is the egg. The two in the center is the polar nuclei. Top part that is usually yellow is known as the anther. Lots of pollen flying around outside, so lots of different types of pollen that lands on stigma. One fuses with the egg to make 2n individuals. One fuses with the polar nuclei to make 3n tissue. At this point, seed begins to harden because now have developing embryo inside.
