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Download Lesson 3 | Plant Reproduction - Kapuk`s E
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Chapter 8: PLANT PROCESSES AND REPRODUCTION Lesson 3: PLANT REPRODUCTION Name Nunchakorn Sonchaiyagorn (Kaupk) Date 2/22/2015 Class 7 Lesson Outline LESSON 3 Plant Reproduction A. Asexual Reproduction Versus Sexual Reproduction 1. Plants can reproduce asexually or sexually. 2. Asexual reproduction occurs when a portion (piece, section, part, etc.) of a plant develops into a separate new plant that is genetically identical to the parent. 3. One advantage of asexual reproduction is that just one parent organism can produce offspring . 4. Sexual reproduction in plants usually requires two parent organisms. 5. Sexual reproduction occurs when a plant’s sperm combines with a plant’s egg . 6. A new plant produced by sexual reproduction is a genetic combination of its parents. B. Skipped! C. Reproduction in Seedless Plants 1. The first land plants to inhabit Earth probably were seedless plants—plants that grow from haploid spores, not from seeds. 2. Moss plants grow by mitosis and cell division from haploid spores produced by the diploid generation. 3. The diploid generations of ferns are the green leafy plants often seen in forests. D. How do seed plants reproduce? 1. Unlike seedless plants, the haploid generation of a seed plant is located within diploid tissue. 2. A(n) pollen grain forms from tissue in a male reproductive structure of a seed plant. a. Pollen grains produce sperm b. Pollination cells. occurs when pollen grains land on a female reproductive structure of a plant that is the same species as the pollen grains. 3. The female reproductive structure of a seed plant where the haploid egg develops is called the ovule . a. After fertilization occurs, a zygote forms and develops into a(n) embryo , which is an immature diploid plant that develops from the zygote. b. An embryo, its food supply, and a protective covering make up a(n) seed . 4. Flowerless seed plants are also known as gymnosperms . a. The most common gymnosperms are conifers , which are trees and shrubs that have needlelike or scalelike leaves. b. The male and female reproductive structures of conifers are called cones . 5. Fruits and vegetables come from angiosperms , or flowering plants. a. The male reproductive organ of a flower is the stamen . b. The female reproductive organ of a flower is the pistil c. The ovary . of a flower contains one or more ovules. d. Angiosperm pollen grains travel by wind, gravity, water, or animal from the anther to the stigma , where pollination occurs. e. The ovary and sometimes other parts of a flower will develop into a(n) fruit that contains one or more seeds. f. Fruits and seeds are important sources of food for people and animals. g. When an animal eats a fruit, the fruit’s seeds through the animal’s digestive system with little or no damage. can pass