WELCOME TO KINGDOM PLANTAE
Classify Kingdom Plantae into four groups:
i. Bryophytes
ii. Pteridophytes
iii. Gymnosperms
iv. Angiosperms
UNIQUE CHARACTERISTICS
• Multicellular eukaryotes
• Photosynthetic autotrophs that utilize chlorophylls to trap light energy for the process of photosynthesis
• Primary food storage : starch
• Cell wall : cellulose
• Have 2 generations : Alternation of generations
• “A life cycle in plants involved the alternation between 2 multicellular bodies, sporophyte (diploid/2n) and gametophyte (haploid/n) generation”
• In which takes turn to produce one another during the life cycle
• Sporophyte generation which produce haploid spores by meiosis
• Gametophyte generation which produce haploid gametes by mitosis
Starts with a mature sporophyte (2n) which produces haploid spores by meiosis, a process which results in a reduction of the number of chromosomes by a half
The spores germinate and grow into a gametophyte(n)
At maturity, the gametophyte(n) produces gametes by mitosis, which does not alter the number of chromosomes
Two gametes fuse to produce a zygote, which develops into a diploid sporophyte (2n)
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