flagellum

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29 05, 2017

How do eukaryote flagella move cells?

By |2019-06-01T13:23:00-07:00May 29th, 2017|Biology|0 Comments

Human sperm cells with flagella (under a microscope): Eukaryote flagella Not the old kind of flagella About two billion years ago, the first eukaryote cells evolved from the earlier prokaryote cells.  These eukaryote cells also evolved a new way to move themselves around. What are prokaryotes? What are eukaryotes? Eukaryote project All our [...]

29 05, 2017

How do cells move around? The flagellum

By |2019-06-10T05:47:04-07:00May 29th, 2017|Biology|0 Comments

Bacterium with a flagellum (under a microscope) Cells drift in the current... The simplest cells, developing about four billion years ago, had no way to control their own movement. They lived in the oceans, and they floated wherever the water took them. Sometimes they found food there, and sometimes they didn't. Most cells [...]

28 05, 2017

What are eyespots? Evolution of eyes – Biology

By |2019-06-03T15:52:30-07:00May 28th, 2017|Biology|0 Comments

Euglena have red eyespots (thanks to Sharon Mooney) When did cells learn to see? About two billion years ago, or maybe a little later, some eukaryote cells developed the ability to see. That was during the Proterozoic period, not long after the first cells evolved. Sight was one of the first things that [...]