Astronomy 2021A/B Lecture 5: Astro Week 5 Reading
9 Dec 2016
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Astro chapter 5 the nature of life on earth. Six key properties of life on earth are: order, Materials in living organisms always exhibit some type of order the molecules in living cells are not scattered ran- domly about but instead are arranged in patterns that make cell struc- tures. Note that order alone does not make something living. However, order is not a sufficient condition for life, because order alone does not make some- thing alive: reproduction. Note that not all living organisms are capable of reproduction. For example, a mule is sterile and cannot reproduce. However, the mule still meets the repro- duction criterion because it is the product of reproduction between two closely related animals (a horse and a donkey): growth and development, Living organisms grow and develop in patterns determined at least in part by heredity: energy utilization, Living organisms use energy to fuel their many activities.
