How Single Cells Evolved
The question of how single celled organisms evolved into more dynamic multicellular ones is difficult to answer, but scientists in Tennessee believe genetic on/off switches provide a clue.
The question of how single celled organisms evolved into more dynamic multicellular ones is difficult to answer, but scientists in Tennessee believe genetic on/off switches provide a clue. "How colonies of single cells evolved into multicellular organisms has long been a puzzle. The process requires single cells to band together and divide the tasks of life. To do so, some cells must give up their ability to reproduce," says the New Scientist. "To investigate, Sergey Gavrilets of the University of Tennessee in Knoxville created a mathematical model describing a colony of identical cells able to survive and reproduce. He assumed trade-offs between the tasks: being better at reproducing made cells worse at survival, and vice versa. In the simplest case, the colony evolved into organisms made of cells that were mediocre at both tasks."
A federal judge ruled that the Trump administration likely violated the reporter's Fifth Amendment rights when it stripped his press credentials earlier this month.
- Acosta will be allowed to return to the White House on Friday.
- The judge described the ruling as narrow, and didn't rule one way or the other on violations of the First Amendment.
- The case is still open, and the administration may choose to appeal the ruling.
Progressive America would be half as big, but twice as populated as its conservative twin.
- America's two political tribes have consolidated into 'red' and 'blue' nations, with seemingly irreconcilable differences.
- Perhaps the best way to stop the infighting is to go for a divorce and give the two nations a country each
- Based on the UN's partition plan for Israel/Palestine, this proposal provides territorial contiguity and sea access to both 'red' and 'blue' America
The definition of a kilogram will now be fixed to Planck's constant, a fundamental part of quantum physics.
- The new definition of a kilogram is based on a physical constant in quantum physics.
- Unlike the current definition of a kilogram, this measurement will never change.
- Scientists also voted to update the definitions of several other measurements in physics.
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