Principles of Biology - Biology 102 Lake Tahoe Community College
Spring Quarter Instructor: Sue Kloss
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Ch. 38 Angiosperm Reproduction
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A Life Cycle of a flowering plant
1. flower
2. Parts of a flower-
a. petals -
b. reproductive organs
3. life cycle of generalized angiosperm
B. development of pollen and ovules
1. haploid and diploid
2. sporophyte and pollen
C. Mechanisms that prevent self fertilization
1. sex
2. self fertilization
3. barriers to prevent selfing
II. Ovule develops into a seed
A. Double fertilization
1. one sperm fertilizes egg
2. other sperm
3. this occurs only in plants, mainly angiosperms.
4. after fertilization
B. Ovary develops into a fruit
1. protects seeds
2. helps disperse
3. Simple fruits.
4. Aggregate fruits
5. Multiple fruits
C. Seed germination
1. imbibation
E. Asexual Reproduction
1. Fragmentation
2. A garlic bulb is actually an underground stem
3. A redwood tree
4. ring of creosote bushes
5. Many grasses
6. meristems retain the ability to sustain growth
7. vegetatively reproduced plants
8. Sexual and asexual reproduction
Questions for homework/ Lesson Objectives for Chapter 38
1. Identify all major structures and processes, and haploid and diploid structures, and explain the basic plant life cycle with alternation of generations in angiosperms.
2.Draw an idealized flower, correctly label the following structures and describe the function of each structure:
a. sepals
b. petals
c. stamen (filament and anther)
d. carpel (style, ovary, ovule, and stigma)
4. Distinguish between:
a. bisexual and unisexual flowers
b. monoecious and dioecious plant species
5. Explain by which generation, structure, and process spores are produced; do the same with gametes.
6. Name the structures that represent the male and female gametophytes of flowering plants.
7. Distinguish between pollination and fertilization, and explain how pollen can be transferred between flowers.
8. Describe mechanisms that prevent self-pollination.
9. Draw and label the important structures and the process of double fertilization. Explain the adaptive advantage of double fertilization in angiosperms.
10. Explain how fertilization in animals is similar to that in plants.
11. Describe fate of the ovule and ovary after double fertilization. Note where major nutrients are stored as embryo develops.
12. Describe the development and function of the endosperm.
13. Explain how seed dormancy can be advantageous to a plant. Describe some conditions for breaking dormancy.