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Asexual & Sexual Reproduction
Transcript of Asexual & Sexual Reproduction
parent more than the other, t will not be identical to either parent. Advantages and Disadvantages of Asexual Reproduction: A great advantage of asexual reproduction is that asexual reproduction can produce a lot of individuals very quickly. A disadvantage is that if conditions become unfavorable, the entire population may be wiped out. Advantages of Sexual Reprodcution Has the advantage of providing lots of variation, which helps species survive environmental change. Asexual Reproduction: Involves only one parent. All the offspring that result from asexual reproduction are identical to the parent and inherit all their characteristics. There are several forms of asexual reproduction such as: Binary Fission, Budding, Spore Production and Vegetative Reproduction. Binary Fission: Only one-celled organisms like bacteria reproduce using this process (binary fission). During this process one cell splits exactly in two producing two identical individuals. Budding: Organisms such as hydra and yeast reproduce asexually by budding. This happens when the parent produces a small bud or a smaller version of itself. Hyrda: small fresh water animals. Yeast: unicellular fungus. Spore Production: When one individual produces many spores, and each spore can become a new individual identical to it's parent. Ex. : Fungi, green algae Spores are similar to seeds but are produced in the division of cells of the parent, not by the union of two cells. Vegetative Reproduction: When the reproduction of a plant doesn't require a formation of a seed. Forms of vegetative reproduction are cutting, tubers, runners. bulbs, and suckers. Runners: Can also be called the stems of the plant. They grow at the soils surface or below forming new plants. Bulbs: A short underground shoot used for food storage. Roots begin to grow from the bottom of the bulb forming new stems and leaves. Cutting: When a branch of a plant gets cut off and is planted in water. The branch within time grows new roots and stems. Tubers: Happens when buds grow on the surface of a plant and each of these buds grow a new plant identical to the parent. Suckers: The roots of the plant. When broken some roots can grow a new plant. Advantages of Asexual Reproduction: Asexual Reproduction can produce very quickly.This is a great advantage for environments that don't have a large variation. Disadvantages of Asexual Reproduction: The main disadvantage of asexual reproduction is that when conditions don't meet the standards of that certain environment. Sexual Reproduction in Plants? : During sexual reproduction in plants it requires a male gamete and a female gamete to produce a zygote and an embryo. Gamete: A cell that has one role only, it is to join with another gamete in reproduction. Embryo: An embryo will eventually within time will develop into an individual. In most plants, the embryo is produced inside a seed. Pollen: Contains the male gametes of a plant. Can be found in the stamen (male part) of the plant. Filament: Provides structure for the anther. The filament is also one of the male parts in the plant. Pistil: The female parts of the plant. Style: One of the female parts. The style is a long tube that leads to the ovary of the plant. Ovules: is the containment unit of the female gametes of the plant. Stigma: A sticky bulb at the top of the style. Ovary: Is found usually in the bottom of the plant. The ovary also contains the ovules. Stamen: The male parts of the plant. Anther: The male part of the plant that contains and produces the pollen. Usually found on top of the filament. Pollination: Happens when the pollen from the anther transfers to the stigma. Cross-Pollination: Happens when the pollen of one plant is transferred to another plant's stigma. This can happen by: wind, water, or animals (bees, butterflies). Cross-Fertilization: Happens when a grain of a pollen makes a tube the grows down the style of the plant into the ovary that has the ovules. Seed: Acts like a shield for the embryo. The seed also stores food for the embryo to eat when it begins to grow into an individual. Zygote: First cell of a new individual. Then divides into two cells. Bibliography:
http://www.artfulhome.com/product/Black--and--White-Photograph/Autumn-Lily-Pad-Flower/62251 Disadvantages of Sexual Reproduction: The main disadvantage is that this type of reproduction does require a lot of energy. The End (:
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