Reproduction In Plants

Reproduction In Plants

Reproduction is the Spice of LifeWhat are the two types of reproduction?Asexual and Sexual What are the advantages of Asexual repro?Quick and Easy typically done by simple organism with small circular DNAOne is enough do not require a partnerWhat are the advantages of Sexual repro?Variation mixing DNA means better survival rateMutations increased rate of positive changes in DNA

DNACell Wall

Steps of Binary FissionWhat type of division allows sexual reproduction to occur?MeiosisWhat type of division allows asexual reproduction to occur?Mitosissort ofBinary Fission division of a simple cell through asexual reproductionCell grows in size; elongates cell wallCircular DNA is replicated (organelles too)DNA and organelles move towards opposite poles of the cellCytokinesis cuts cell in two

DNACell membraneCell Wall

Spore FormationDo only bacteria cells reproduce asexually?No! Fungi and some plants have an asexual part of their life cycle Gametophyte and Sporophyte cycles:Spores are released into the air by a sporophyte Spores grows through mitosis to build hypha, mycelium, and sporangia (makes more spores)Eventually a gametophyte forms and produces male and female gametes by meiosisGametes mix by fertilization and produce a zygote that grows into a sporophyteSporophyte will produce more spores through meiosis and cycle repeats

HyphaSporangiaSpores ReleasedGerminate

SporesGametesFertilizationZygoteMeiosis

Potato-A-Go-GoWhich part of the potato do we eat?The Tuber! It is the starch filled energy bank for the potato plantHow do potatoes reproduce?With the Tuber!Parent plant grows from tuber; Extra energy from photosynthesis is made into starch and stored in new tubersParent plant dies at the end of the season; tubers stay dormant undergroundNew plants grow from tuber eyes next season; tuber also acts are source of energy before leaves formAll growth is through mitosis, so all tubers are genetically identical to each other

New PlantEye