I. Life in the Universe
- What is Life?
- Life is matter that can reproduce
itself and evolve as survival
dictates.
- Life on Earth is carbon-based. Carbon can easily form long molecule
chains.
- Most life on Earth is composed of
cells (viruses are not), which have
proteins as their building blocks.
Proteins have amino acids as their building
blocks.
- The molecule DNA is located in the
nuclei of cells. This molecule carries all of the genetic information. It is
through this molecule that life is able to reproduce itself.
- Evolution takes place by mutation
coupled with natural selection so lifeforms
better adapted to the given environment will survive and reproduce more with
these survival traits.
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