Related Questions. How Do These Structures Differ? [citation needed] Mosses and leafy liverworts have structures called phyllids that look like leaves, but are not true leaves because they are single sheets of cells with no internal air spaces, no cuticle or stomata and no xylem or phloem. Plants in both divisions exhibit alternation of generations. They do not make flowers or fruits though, so their seeds are unprotected. Play this game to review Plant Anatomy. Gymnosperms are primitive plants that produce seeds but not flowers or fruit. True roots and leaves were absent; with the largest species being 50 cm. Pollen grains are transported by the wind to other trees, and fertilization occurs in a similar manner as that of angiosperms. Ferns, horsetails (also called Indian puzzle plant) and club mosses are types of seedless vascular plants in that they have a root system and leaves that can hold water. Which of the following options lists the correct sequence of the appearance of the four major groups of plants in the fossil record, from most ancestral to most recent? Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity. Their gametes are produced mitotically by a gametophyte (n) that lives independently. Angiosperm seeds are made in flowers and mature into fruit. A). They are heterosporous however they do use a type of pollen. Seedless vascular plants reproduce by... Seedless Vascular Plants DRAFT. vascular plants) and those that do not have vascular systems. yes they both do. This is how they got their name, which means "naked seed." bryophytes, seedless vascular plants, gymnosperms, angiosperms B). Seedless plants can be vascular, meaning they retain water in the tissue of the plant, or they can be nonvascular. A. Pollen Represents The Mature Multicellular Male Gametophyte While Spores Are Unicellular Haploid Cells. The first split in plant classification is whether plants have vascular systems (a.k.a. These forests gave rise to the extensive coal deposits that gave the Carboniferous its name. In seedless non-vascular plants, or bryophytes (mosses), the haploid gametophyte is larger than the sporophyte (the plant structure that you see is the gametophyte); this is a gametophyte-dominated life cycle.