Feb 05, 2013
UCSB Physics Colloquium: Stirring Tails of Evolution
Ray Goldstein, Cambridge Univ.
One of the most fundamental issues in evolutionary biology is the nature
of transitions from unicellular organisms to multicellular ones. Many
basic questions arise in this context:
In this talk I will describe an approach to these broad questions based
on the use of a particular lineage of green algae which serves not only
as a model for evolutionary studies, but also for many aspects of
biological physics and fluid dynamics associated with eukaryotic
flagella, the tail-like appendages that confer motility. I will focus on
experimental and theoretical results from my lab that examine the fluid
flows driven by these flagella, their synchronization, and the mechanism
by which multicellular organisms composed of thousands of cells exhibit
accurate phototaxis in the absence of a central nervous system.
- What are the advantages of being larger?
- What are the driving forces behind the appearance of distinct
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