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Advantages and Disadvantages of the Types of Reproduction Investigation
• For each example of reproduction given in the PowerPoint write down 1 advantage and 1 disadvantage of the type of reproduction.
Types of Asexual Reproduction In Animals• Budding: happens when
a part of the parent organism pinches off and forms a new organism.
• The new organism separates from the parent and lives independently.• Jellyfish & hydra
Budding
• Organism develops tiny buds on its body
• Asexual reproduction
• Buds form from the parent cell so the bud is identical to the parent.
• Both unicellular and multicellular
• Examples: hydra, plants, some yeast
Types of Asexual Reproduction In Animals• Fragmentation: parts of
the organism break off and a new organism grows identical to the parent.
• Worms & starfish
Types of Asexual Reproduction In Animals• Regeneration: organism
loses a body part and that part may develop into a new organism or simply reform.
• Sea star
Regeneration:
• Specialized cells grow new tissue when a wound or lost limb occurs
• Examples: Starfish, lizard tails, planarian, cuttings from plants….
Cell Division in Unicellular Organisms
Binary Fission:
• form of asexual reproduction in prokaryotic (lacks nucleus) organisms
• Parent organism splits in half
(Eukaryotic – reproduce by mitosis ex: algae, some yeast, protozoans like paramecium)
Spores:
• Single-celled asexual reproductive unit of non-flowering plants, bacteria, fungi, and algae
• Identical to parent
• Released by parent organism
• Think of them like seeds; they are made to grow a new plant and all they need is the proper environment to thrive.
Spores
• Spore Formation – spores = small specialized cells that contain a nucleus and cytoplasm surrounded by a thick outside wall which protects the spore. Under the right conditions the spore can rise to a new organism. Found in bacteria, molds, yeast, mushrooms, mosses, ferns and some protozoans.
Spawning
• In spawning, females release many eggs into the water; then males release sperm over the eggs
Pollination• Pollination is the transfer of pollen from a male part
of a plant to a female part of a plant, enabling later fertilization and the production of seeds, most often by an animal or by wind.
Phenomenon Connection
Thinking about back to the phenomenon of the lizard regrowing its tail.
• Describe which type of reproduction and give evidence.
• Give 1 advantage and 1 disadvantage of this reproduction.