Class of: 12-Apr-2016.
Today we discussed the alternation of generations feature that mosses have!
Please review the learning objectives below:
- Students will be able to follow the life cycle of moss through gametophyte and sporophyte forms, describe the key features and structures of each stage, and explain why alternation of generations is important.
Some questions to ponder from class:
1. Diagram the following stages into a life cycle of mosses:
a. Gametophyte
b. Sporophyte
c. Sperm
d. Eggs
e. Spores
2. Label each section above with “n” or “2n” depending on its ploidy.
3. Where exactly does sexual reproduction take place during the life cycle?
4. Where exactly does asexual reproduction take place during the life cycle?
5. Given their structures, why do you suppose the gametophyte is usually dominant?
6. What is one situation where asexual reproduction has an advantage over sexual?
7. What is another situation where sexual reproduction has an advantage over asexual?
8. Why is alternation of generations therefore important?