BSC 116 Lecture Notes - Lecture 9: Venus Flytrap, Fruit Anatomy, Nitrifying Bacteria
14 Feb 2017
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Embryonic meristems facilitate asexual reproduction by fragmentation: parent plant severed, leads to two individuals (same genome) Other mechanisms of asexual reproduction: adventitious shoots. Ex. aspen grooves: apomixis- seeds produced by mitosis; no fertilization. Advantages: don"t need another individual near(cid:271)y to reprodu(cid:272)e, no frail little seedling, pass on exact genetic info of parent. Disadvantages: pass on exact genetic info of parent. selfing is sexual but has the same disadvantages: many plants with self-incompatibility, chronologically or physically separate male and female parts. Flowers are reproductive shoots: flowers- sex-organs made of up to 4 rings of specialized leaves (sporophylls) Petals- may be brightly colored to attract pollinators. Complete flowers vs. incomplete flowers: depends upon complement of organs. Sticky stigma binds pollen; style connects it to ovary (1+ ovules: complete = contains all 4 parts. Incomplete = missing at least 1 part of flower. Flowers may be in single clusters or arranged in an inflorescence.
