Sexual and Asexual Reproduction.

Asexual Reproduction: One parent producing an offspring identical to itself (parent) Offspring can live independently

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)

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

Regeneration: Specialized cells grow new tissue when a wound or lost limb occurs Examples: Starfish, lizard tails, planarian, cuttings from plants….

Asexual Reproduction & Health Bacteria reproduces at very rapid rates Reason you get sick within a day..

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.

Sexual Reproduction Two parents egg (female) and sperm (male) Fertilization – when egg and sperm unite Plants growing from seeds and animals growing from eggs Creates the diversity of life on earth Offspring is unique

Asexual Reproduction One parent Identical to parent More likely to get disease Binary Fission, budding, regeneration, spore formation

Sexual Reproduction Two parents – male and female Unique offspring ( not identical to parents) Egg, sperm Fertilization ( egg and sperm unite) More resistant to disease