Skip to main content

Home/ science/ Group items tagged biology

Rss Feed Group items tagged

Erich Feldmeier

Strassmann & Queller: Close family ties keep cheaters in check: Why almost all multicel... - 0 views

    ""Experiments with amoebae that usually live as individuals but must also join with others to form multicellular bodies to complete their life cycles showed that cooperation depends on kinship.

    If amoebae occur in well-mixed cosmopolitan groups, then cheaters will always be able to thrive by freeloading on their cooperative neighbors. But if groups derive from a single cell, cheaters will usually occur in all-cheater groups and will have no cooperators to exploit. A multicellular body like the human body is an incredibly cooperative thing," Queller says, "and sociobiologists have learned that really cooperative things are hard to evolve because of the potential for cheating.

    "It's the single-cell bottleneck that generates high relatedness among the cells that, in turn, allows them to cooperate, " he says."
Janos Haits

Science Daily: News & Articles in Science, Health, Environment & Technology - 12 views

    Roll over headlines to view top news summaries:
    Making Skinny Worms Fat and Fat Worms Skinny
    'Exploratory' Butterflies Genetically Different
    Spiders Target Insects' Mate-Luring Signals
    Huge Natural Arch Found In Afghanistan
    Warm Water For Cold Winters in Northeast
    Ocean and River Water for Electricity
    Blood-Testing Device Can Spot Cancer, HIV
    Continuing Winter Ice Loss in Arctic Sea
    Plants Optimize Before Spinning Off New Species
    Hidden Code Reveals Brain Activity
thinkahol *

The Biology of Consciousness | WBUR and NPR - On Point with Tom Ashbrook - 0 views

    "Renegade husband and wife philosophers Pat and Paul Churchland met forty years ago in a college Plato class. Their instincts as philosophers - then and now - run outside the philosophy mainstream. Where most philosophers looked to reason and logic to apprehend the human mind, the Churchlands looked - and look - to science.

    There is no independent "mind", these two practically say, just the human brain, three pounds of tissue and water, firing away behind all our emotions, beliefs, actions. Consciousness itself, they say, is straight biology, a machine.

    Once, that sounded esoteric. Now, it's on the frontline of debate over law, soul and life."
Walid Damouny

Free will is an illusion, biologist says - 2 views

    "When biologist Anthony Cashmore claims that the concept of free will is an illusion, he's not breaking any new ground. At least as far back as the ancient Greeks, people have wondered how humans seem to have the ability to make their own personal decisions in a manner lacking any causal component other than their desire to "will" something. But Cashmore, Professor of Biology at the University of Pennsylvania, says that many biologists today still cling to the idea of free will, and reject the idea that we are simply conscious machines, completely controlled by a combination of our chemistry and external environmental forces."
Walid Damouny

Glow-in-the-dark mushrooms discovered - LiveScience- - 2 views

    "Freaky findings shed light on evolution of luminescence in nature"
Charles Daney

Bee calamity clarified :The Scientist [24th August 2009] - 0 views

    An illness that has been decimating US honeybees for more than three years probably isn't caused by a single virus, but by multiple viruses that wear down the bees' ability to produce proteins that can guard them against infection, according to a new study.
Walid Damouny

Scientists Discover Hunger's Timekeeper - 0 views

    Researchers at Columbia and Rockefeller Universities have identified cells in the stomach that regulate the release of a hormone associated with appetite. The group is the first to show that these cells, which release a hormone called ghrelin, are controlled by a circadian clock that is set by mealtime patterns. The finding, published in Proceedings of the National Academy of Sciences, has implications for the treatment of obesity and is a landmark in the decades-long search for the timekeepers of hunger.
Walid Damouny

Professor hatches century-old eggs to study evolution - 0 views

    Suspending a life in time is a theme that normally finds itself in the pages of science fiction, but now such ideas have become a reality in the annals of science.
1 - 12 of 12
Showing 20 items per page