Researchers Develop New Strategy for Detecting Consciousness Abby Olena Nov 21, The EEG-based method could help clinicians identify patients with severe brain injuries who are actually capable of some cognitive function, despite appearing unresponsive. Shawna Williams Nov 20, The Stanford University researcher discusses a new study on measures such as data sharing and funding disclosures. Ashley Yeager Nov 20, A whistleblower claims his former supervisor committed fraud when applying for government funds.
Image courtesy of Random House Advertisement As children, many of us learn about the wondrous process by which a caterpillar morphs into a butterfly. The story usually begins with a very hungry caterpillar hatching from an egg.
The caterpillar, or what is more scientifically termed a larva, stuffs itself with leaves, growing plumper and longer through a series of molts in which it sheds its skin. One day, the caterpillar stops eating, hangs upside down from a twig or leaf and spins itself a silky cocoon or molts into a shiny chrysalis.
Within its protective casing, the caterpillar radically transforms its body, eventually emerging as a butterfly or moth. But what does that radical transformation entail? How does a caterpillar rearrange itself into a butterfly?
What happens inside a chrysalis or cocoon? First, the caterpillar digests itself, releasing enzymes to dissolve all of its tissues.
If you were to cut open a cocoon or chrysalis at just the right time, caterpillar soup would ooze out.
But the contents of the pupa are not entirely an amorphous mess. Certain highly organized groups of cells known as imaginal discs survive the digestive process.
Before hatching, when a caterpillar is still developing inside its egg, it grows an imaginal disc for each of the adult body parts it will need as a mature butterfly or moth—discs for its eyes, for its wings, its legs and so on.
In some species, these imaginal discs remain dormant throughout the caterpillar's life; in other species, the discs begin to take the shape of adult body parts even before the caterpillar forms a chrysalis or cocoon.
Some caterpillars walk around with tiny rudimentary wings tucked inside their bodies, though you would never know it by looking at them. Once a caterpillar has disintegrated all of its tissues except for the imaginal discs, those discs use the protein-rich soup all around them to fuel the rapid cell division required to form the wings, antennae, legs, eyes, genitals and all the other features of an adult butterfly or moth.
The imaginal disc for a fruit fly's wing, for example, might begin with only 50 cells and increase to more than 50, cells by the end of metamorphosis.
Depending on the species, certain caterpillar muscles and sections of the nervous system are largely preserved in the adult butterfly. One study even suggests that moths remember what they learned in later stages of their lives as caterpillars. Getting a look at this metamorphosis as it happens is difficult; disturbing a caterpillar inside its cocoon or chrysalis risks botching the transformation.
But Michael Cook, who maintains a fantastic website about silkwormshas some incredible photos of a Tussah silkmoth Antheraea penyi that failed to spin a cocoon. You can see the delicate, translucent jade wings, antennae and legs of a pupa that has not yet matured into an adult moth—a glimpse of what usually remains concealed.Science writer Willy -- Find potential answers to this crossword clue at grupobittia.com Thank you for visiting this page.
Please find below all the New York Times Crossword November 18 Answers. Here you will be able to find all the answers and solutions for the popular daily New York Times Crossword Puzzle. Clue: Science writer Willy. Science writer Willy is a crossword puzzle clue that we have spotted 5 times.
There are related clues (shown below). We would like to thank you for visiting our website! Please find below all Science writer Willy answers and solutions for the daily New York Times Crossword Puzzle. Since you have landed on our site then most probably you are looking for the solution of Science writer Willy.
A mad-hatter’s tea party in Willy’s dream of being a famous writer. In he created Willy, Project MUSE promotes the creation and dissemination of essential humanities and social science resources through collaboration with libraries, publishers, and scholars worldwide.
Kids try out this fun crossword puzzle game about the American Revolution.
Learn about history and have fun at the same time. History Biography Geography Science Games.
Crossword Puzzle Printable version Back to all Crossword Puzzles. American Revolution Click on a word in the puzzle to see the clue.
Writer of the Declaration;.