Week8LabReport - 2nd ed-1.rtf - Week 8 Lab Report Form...

Week 8 Lab Report Form
Carefully read and study the information in the assigned lab, including all videos and
activities. Add your answers to this answer sheet, and then submit this completed Lab
Report Form.
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This week you will perform Experiments 1 and 2 of the following lab:
Lab - Plant Reproduction
Carefully study the information in the lab. Be sure to notice the similarities and
differences in the reproductive cycles of bryophytes (nonvascular plants such as mosses),
gymnosperms (naked seed plants that include coniferous trees such as pines), and
angiosperms (flowering plants with covered seeds in fruits).
Complete Experiments 1 and 2. Then answer the following questions and submit them in
this lab report.
Questions for Experiment 1: Observation of Archegonium and Antheridium (use the
diagram of the life cycle of a moss in your textbook to help you answer these
questions):
1. Which generation (gametophyte or sporophyte) is haploid? Sporophyte generation
2. Which generation (gametophyte or sporophyte) is diploid? Gametophyte generation
3. Are the spores produced by the moss sporophyte formed by meiosis or mitosis?
4. Are the spores produced by the moss sporophyte haploid or diploid? Haploid
5. Do the spores belong to the gametophyte or sporophyte generation? Sporophyte
6. Describe the plants that grow from the spores and indicate whether they belong to the
gametophyte or sporophyte generation. Ferns and mosses grow from spores in which they
live in damp and shady environments. Adult ferns produce spores in capsules inside
chambers on the underside of their leaves. In dry conditions, the capsules release the
spores into the air. When a spore lands on moist ground, it develops into a tiny, heart-
shaped structure called a prothallus, this produces the sex cells. Fertilized by male sperm,
the female egg of the prothallus develops into a new adult plant. In addition, mosses and
liverworts are known as bryophytes. Adult bryophytes produce the sex cells. Fertilized
female eggs then grow into a stalked sporophyte, or spore capsule. Once they are
released, the spores develop into the next generation of moss.