Reproduction in plants. Can be sexual or asexual Asexual – budding, bulbs and rhizomes –...
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Reproduction in plants
Can be sexual or asexual
• Asexual – budding, bulbs and rhizomes – vegetative growth by mitosis only – no diversity as genes are not swapped between different individuals
Can be sexual or asexual
• Sexual reproduction in plants, just like in animals, involves the fertilization of eggs (female gametes) by sperm (male gametes).
• Two stages in their life cycle to carry out sexual reproduction – Alternation of Generations
Alternation of generation
• A haploid (n) stage – Gametophyte• A diploid stage (2n) – Sporophyte
(Copy drawing from board)
Differences between plant groups
• Mosses, ferns, gymnosperms and angiosperms have key differences in their alternation of generations.
• In some, the gametophyte is dominant; in others the sporophyte is dominant (dominant meaning the stage that the plant is in for most of its life and the stage that is more visible)
Differences between plant groups
• Pg 241 – 242 in your workbook (cut out Algae)
• Moss (bryophytes)• Fern• Gymnosperm (conifers)• Angiosperm (flowering plants)
Mosses (bryophytes)
Ferns
Gymnosperm
Angiosperm