BIOL 2004 Study Guide - Midterm Guide: Black Pepper, Apoptosis, Microsporangia
25 Feb 2016
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First evolved in cretaceous: 140 mya, most species around 50 mya. Rafflesia anoldii, monster flower : flower disperses ~4 million seeds, but flower is only present for a few days. World"s largest influorescence: unbranched hundreds of flowers on one branch, the corpse flower. Make up more than 90% of existing plant species: astounding variation. Seen in the arabidopsis thaliana: weedy, short generation time, hugh fecundity. >10 000 seeds: small size, self-fertilizing, transformable, small genome. Genetically modified by addition of a new gene: new gene may give new function. 142 mya fossil of first flowering plant found in china. Angiosperms highly adaptable: can colonize extreme environments. This is due to superior reproductive system. Arctic flowers have short life span, so are very brightly coloured to attract as many pollinators as possible. Have evolved into some aquatic environments: effective competitors with algae. 99% of food comes from angiosperms: both directly and indirectly. True leaves with vascular and photosynthetic tissue.
