Agriculture
Cleaning Up Fish Farms
Watching out for vultures
Got Milk? How?
Amphibians
Salamanders
Newts
Frogs and Toads
Animals
Not Slippery When Wet
Fishing for Giant Squid
Hot Pepper, Hot Spider
Behavior
Sugar-pill medicine
Seeing red means danger ahead
Brain cells take a break
Birds
Pigeons
Robins
Kookaburras
Chemistry and Materials
The memory of a material
Picture the Smell
The solar system's biggest junkyard
Computers
Programming with Alice
Nonstop Robot
New eyes to scan the skies
Dinosaurs and Fossils
Hall of Dinos
An Ancient Feathered Biplane
Fingerprinting Fossils
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Weird, new ant
Plastic-munching microbes
In Antarctica watch the heat (and your step)
Environment
An Ocean View's Downside
A 'Book' on Every Living Thing
To Catch a Dragonfly
Finding the Past
Meet your mysterious relative
A Big Discovery about Little People
Your inner Neandertal
Fish
Sting Ray
Flounder
Bull Sharks
Food and Nutrition
Food for Life
The Color of Health
A Pepper Part that Burns Fat
GSAT English Rules
Finding Subjects and Verbs
Who vs. That vs. Which
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
Ministry of Education Announces 82 GSAT Scholarships for 2010
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exam Preparation
GSAT Mathematics
Prime Time for Cicadas
How a Venus Flytrap Snaps Shut
Setting a Prime Number Record
Human Body
Cell Phones and Possible Health Hazards
Teen Brains, Under Construction
Germ Zapper
Invertebrates
Crustaceans
Tapeworms
Scallops
Mammals
Rhinoceros
Asian Elephants
Humpback Whales
Parents
Raise a Lifelong Reader by Reading Aloud
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
Physics
The Particle Zoo
Project Music
Einstein's Skateboard
Plants
Assembling the Tree of Life
A Change in Leaf Color
Surprise Visitor
Reptiles
Iguanas
Reptiles
Anacondas
Space and Astronomy
Planets on the Edge
A Great Ball of Fire
Unveiling Titan
Technology and Engineering
A Micro-Dose of Your Own Medicine
Model Plane Flies the Atlantic
Smart Windows
The Parts of Speech
What is a Preposition?
Countable and Uncountable Nouns
Adjectives and Adverbs
Transportation
Troubles with Hubble
Morphing a Wing to Save Fuel
Reach for the Sky
Weather
Weekend Weather Really Is Different
Polar Ice Feels the Heat
Science loses out when ice caps melt
Add your Article

How a Venus Flytrap Snaps Shut

The blink-of-an-eye closing of a Venus flytrap's leaf on a hapless fly is one of the fastest movements in the plant kingdom. Now, after more than a century of wondering how these flesh-eating plants do it, scientists have come up with a possible explanation. The secret isn't muscle; it's geometry. The shape and structure of a Venus flytrap's leaf allows it to snap up juicy insect morsels in just a tenth of a second, say researchers from Harvard University, Rockefeller University, and the University of Provence. Lots of plants move, but their movements are usually very slow. It can take days for flower buds to open and hours for leaves to respond to sunlight. Flytraps snap shut much more rapidly. Mathematician Lakshminarayanan Mahadevan had long wondered how flytraps are able to react so quickly. Then, a researcher he works with gave him one of the plants for his office, and he decided to find out what's going on. Mahadevan and his colleagues painted fluorescent dots on the curved leaves of a group of flytraps and measured the leaves using a microscope. The researchers also took high-speed videos of the plants in action. The pictures and measurements showed what happens after an insect or some other object lands on a leaf and triggers it. First, cells on the outside surface of the plant's leaves get longer, while cells on the inside surface don't change. This makes the leaves want to curl inward. The oppositely curved shape of an open leaf, however, causes it to resist the inward push. The team's measurements showed that pressure builds up for about a second, until the leaf can't take it anymore. Then, the leaf takes just a fraction of a second to snap shut. Scientists suspect that the same mechanism may trigger rapid motion in other plants. Engineers could also try taking advantage of this effect when they're designing new sensors, valves, or other devices.E. Sohn

How a Venus Flytrap Snaps Shut
How a Venus Flytrap Snaps Shut








Designed and Powered by HBJamaica.com™