SCI 106 Plants OK SUCCESSS Quest

SCI 106 Plants OK SUCCESSS Quest - Plants Plants First Land...

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P l a n t s   
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Plants First Land Plants: related to green algae exposed to temperature variations, gravitational forces Adaptations: vascular tissue waxy cuticle
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Humans All of our cells have 46 chromosomes, EXCEPT the Sex cells = Gametes = Ovum and Sperm…have ½ that number (or 23 chromosomes). Diploid # (2n) = the number of chromosomes Haploid # (n) = ½ the number of chromosomes Therefore; 2n = 46 n = 23
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Humans When fertilization occurs, each parent contributes 23 chromosomes to the offspring which reestablishes the diploid number of chromosomes.
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PLANTS (diploid) SEED (embryo (fruit) SPORES (haploid) GAMETES Sperm and Egg ZYGOTE (diploid) Haploid Generation Diploid Generation Fertilization
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GYMNOSPERMS Conifers (cone bearing) 286 million years ago Widespread, Northern lands Dry, cool climates, short growing seasons Example: Pine Tree adaptations to winter: flexible branches needle-like leaves Supply lumber and paper
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ANGIOSPERMS Dominate most land areas
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SCI 106 Plants OK SUCCESSS Quest - Plants Plants First Land...

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