Guess quote

Andrew H. Knoll [1951-0] American

Rank: 110
Scientist, Professor

Andrew Herbert Knoll is the Fisher Professor of Natural History and a Professor of Earth and Planetary Sciences at Harvard University.

Quote	Tags	Rank
If you look at the ecological circuitry of this planet, the ways in which materials like carbon or sulfur or phosphorous or nitrogen get cycled in ways that makes them available for our biology, the organisms that do the heavy lifting are bacteria.		101
It's fair to say when you go out and walk in the woods or on a beach, the most conspicuous forms of life you will see are plants and animals, and certainly there's a huge diversity of those types of organisms, perhaps 10 million animal species and several hundred thousand plant species.		102
I think you can say that life is a system in which proteins and nucleic acids interact in ways that allow the structure to grow and reproduce. It's that growth and reproduction, the ability to make more of yourself, that's important.		103

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