My notes and thoughts from Biology 111, for Wednesday, August 20, 2008. The entire series can be found here.
Great introductory bio lecture this morning. Living vs. nonliving stuff, hierarchies, stressing on evidence, that sort of thing.
One thing Doc really spent some time on was the difficulty in defining life, and how any definition of life has to encompass so much.
Over the thin skin of the earth, the only place we know for sure that life exists, we’ve documented and cataloged:
over 350,000 species of plants, over a million species of animals (BEETLES!!!), and thousands upon thousands of fungi, protists, bacteria. Given that we have documented about 1.8 million species of life, here’s some context:
That’s life on earth now.
(More Below the fold)