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Natural History
Nov. 7th, 2004 09:20 pmQuestions:
1. Why have only eukaryotes - that is, organisms such as plants, animals, and fungi, whose cells have nuclei - had the ability to form multicellular creatures with different types of cells? Why can't prokaryotes such as bacteria do this?
2. All known organisms share a common ancestry. In Life: An Unauthorised Biography, which I'm currently reading, the eloquent author Richard Fortey maintains this means life only arose once on Earth. Is that necessarily the case?
3. Why green? Could the photosynthetic pigment have been another colour?
"It's going to worry me until I find out." - the Doctor
1. Why have only eukaryotes - that is, organisms such as plants, animals, and fungi, whose cells have nuclei - had the ability to form multicellular creatures with different types of cells? Why can't prokaryotes such as bacteria do this?
2. All known organisms share a common ancestry. In Life: An Unauthorised Biography, which I'm currently reading, the eloquent author Richard Fortey maintains this means life only arose once on Earth. Is that necessarily the case?
3. Why green? Could the photosynthetic pigment have been another colour?
"It's going to worry me until I find out." - the Doctor
