Biology Homework Chapter 31: Reproduction in Flowering Plants
Textbook assignment: Chapter 31: Plant Structure, Reproduction, and Development, sections 9-15.
- 31.9 Flowering plants have highly modified leaf forms to protect the gametophytes. These leaf forms include the sepal (for protection), petals (to attract pollinators), stamens bearing pollen-encrusted anthers, and carpels containing a stigma and the ovary sac.
- 31.10 Angiosperm gametophytes are the pollen grains and the embryo sacs inside the ovaries. When pollen grains land on the stigma tip, one of the two gametes inside forms a pollen tube, the other becomes the fertilizing agent that stimulates development of the embryo in the ovum.
- 31.11 Once fertilized, the embryo sac forms an endosperm, seed coat, and embryo. The embryo develops up to a point and then stops, dormant until the seed has the right conditions for development.
- 31.12 The ovary develops into a fruit. This can be simple (developing from a single ovum), aggregate (developing from many carpels), or multiple (developing from many flowers).
- 31.13 When the seed germinates, the embryo resumes development. The seed takes on water and ruptures the coating, allowing the endosperm roots and shoots to escape. Monocots and dicots have different patterns of development.
- 31.14 Plants which normally produce sexually can also produce asexually by cuttings and clones. These are widely used in commercial agriculture to ensure produce consistency.
- 31.15 Plant cloning allows farmers to grow crops with consistent yield and characteristics for particular food uses.
- 31.16 Some adaptations allow plants to live very long lives, especially conifers, which can resist infection, survive drought and freezing temperatures, and survive fire.
Read the following weblecture before chat: Reproduction in Plants.
Take notes on any questions you have, and be prepared to discuss the lecture in chat.
Perform the study activity below:
Chat Preparation Activities
- Essay question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
- Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.
- Required: Complete the Mastery Exercise with a score of 85% or better.
- Optional: Test yourself with the textbook multiple choice questions and note any that you miss that still don't make sense. Bring questions to chat!
- Go to the Moodle and take the quiz for this chapter.
Read through the lab for this week; bring questions to chat on any aspect of the lab, whether you intend not perform it or not. If you decide to perform the lab, be sure to submit your report by the posted due date.
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