1. Flowering Plants.
An Angiosperm is a plant that has flowers and produces seeds enclosed within a carpel. The angiosperms are a large group and include herbaceous plants, shrubs, grasses, and most trees.
2. Multicellular, Unicellular
The main difference between spores and seeds as dispersal units is that spores are unicellular, while seeds contain within them a multicellular gametophyte that produces a developing embryo, the multicellular sporophyte of the next generation.
3. Vascular tissue helps a plant naturally have nutrients traveling throughout it's body. Non-Vascular plants lack those particular tissues, but make up for it with a different, simpler type of tissue. Example, a sunflower vs. algae.