BIOL165 Lecture : Biol165 - introduction pages.pdf
16 Apr 2013
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Biol 165: diversity of life: introduction, this process admittedly requires big jumps from self replicating rna that codes for nothing to rna that codes for proteins that catalyze the replication of rna. Total # of species known to science 1,740,000: insects 1 mil, animals - 365k, plants 321k, protists 65k, fungi 75k, prokaryotes 4. 8 mil. There is great diversity, and many undiscovered species still remaining on earth. Estimated range from 10-20 million to upwards of 100 million undiscovered species. Australian ant: for invertebrates, the lowest # of chromosomes is 2n=2 of an, xanthisma gracilis, has the least # of chromosomes of. Vascular plants at 2n=4: ophioglossum reticulatum (adders tongue fern) has most # of chromosomes at 2n=1260 likely the result of excessive polyploidy, which is a common occurrence in more primitive plants. Classification schemes: systems of classification are built from the bottom up.
