Reference no: EM132932356

Draw, name the plant and label the parts Polytrichum (from the Mosses phylum):

The dominant generation of this plant, like that of all bryophytes, is the gametophyte.

The gametophyte has gametangia, which are gamete-producing organs. The gametangium that produces eggs is called the archegonium. The one that produces sperm is the antheridium. Archegonia and antheridia are often on separate plants. The egg in the archegonium will be fertilized by a sperm cell from an antheridium. The fertilized egg then becomes a zygote, which develops first into an embryo and then into a sporophyte. The sporophyte stays attached to the gametophyte and draws food from it. The sporophyte forms spores (in a sporangium) from which new gametophytes develop.

#1 Polytrichum gametophyte

Draw #1, name the plant and label the parts

2. Archegonium (eggproducing structure of gametophyte; microscope slide). Draw the tip of a female gametophyte, and label the archegonia.

Draw #2, name the plant and label the parts

3. Antheridium (spermproducing structure of gametophyte; microscope slide). Draw the tip of a male gametophyte, and label the antheridia.

Draw #3, name the plant and label the parts

4. Sporophyte with sporangium. Label the sporophyte and the sporangium (the sporeproducing structure). Notice that the sporophyte is attached to a gametophyte.

Draw #4, name the plant and label the parts