Springing forward
Middle school science adventures
Growing Healthier Tomato Plants
Salamanders and Newts
Ants on Stilts
Cacophony Acoustics
Walks on the Wild Side
Two monkeys see a more colorful world
The Disappearing Newspaper
Diving, Rolling, and Floating, Alligator Style
Chemistry and Materials
Graphene's superstrength
The newest superheavy in town
Salt secrets
New eyes to scan the skies
Play for Science
Computers with Attitude
Dinosaurs and Fossils
Hall of Dinos
Tiny Pterodactyl
South America's sticky tar pits
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2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Warmest Year on Record
Watering the Air
A Grim Future for Some Killer Whales
The Best Defense Is a Good Snow Fence
Improving the Camel
Inspired by Nature
Finding the Past
Fakes in the museum
Meet your mysterious relative
A Big Discovery about Little People
Food and Nutrition
The Essence of Celery
Sponges' secret weapon
Making good, brown fat
GSAT English Rules
Capitalization Rules
Who vs. That vs. Which
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
Tarrant High overcoming the odds
Mastering The GSAT Exam
Results of GSAT are in schools this week
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Access denied - Disabled boy aces GSAT
GSAT Mathematics
Setting a Prime Number Record
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Prime Time for Cicadas
Human Body
Foul Play?
Speedy Gene Gives Runners a Boost
A Sour Taste in Your Mouth
Dust Mites
What Not to Say to Emerging Readers
Children and Media
The Surprising Meaning and Benefits of Nursery Rhymes
Black Hole Journey
Invisibility Ring
Hold on to your stars, ladies and gentlemen
Springing forward
Cactus Goo for Clean Water
A Giant Flower's New Family
Komodo Dragons
Copperhead Snakes
Space and Astronomy
Pluto's New Moons
Intruder Alert: Sweeping Space for Dust
A Family in Space
Technology and Engineering
Reach for the Sky
A Satellite of Your Own
Sugar Power for Cell Phones
The Parts of Speech
Problems with Prepositions
Countable and Uncountable Nouns
Adjectives and Adverbs
Where rivers run uphill
Seen on the Science Fair Scene
Flying the Hyper Skies
Earth's Poles in Peril
Polar Ice Feels the Heat
In Antarctica watch the heat (and your step)
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Stalking Plants by Scent

Dodder is a wiry, orange vine that steals water and nutrients from other plants. Scientists have now found that this vine chooses its victim by smell, growing its shoots in the direction of a plant's natural perfume. When a dodder seed sprouts, it doesn't grow roots to seek its own food. Instead, it grows a shoot that reaches out to other plants, tapping them for food. The baby vine needs to find a host within a week to survive. It then grows into a spaghetti tangle that can even ensnare more than one plant. Also known as strangleweed and witches' shoelaces, dodders are listed among the 10 worst weeds in the United States. They can cost farmers millions of dollars by stunting their crops. To figure out how a type of dodder vine known to prefer tomato plants finds a victim, scientists placed dodder sprouts near several possible targets. These targets included pots of moist soil, little jars of dyed water that created colored lights, young tomato plants, and even a cup of perfume made from chemicals that tomato plants give off. Seedlings grew toward the tomato plant. They also reached out toward the cup of tomato perfume. They tended not to grow toward the moist soil or colored water. The scientists then used a different setup, hiding the targets in chambers connected to dodder sprouts only by curving pipes, so the vine could find them only by smell. Dodder sprouts still grew toward their favored targets. By placing dodder sprouts near different plants, the scientists found that the type of dodder that they were studying prefers tomatoes and a flower called impatiens. And when given a choice between tomato and wheat, vine seedlings grow toward tomato. The researchers then tested seven of the ingredients that make up tomato perfume separately. Dodder sprouts were attracted to three of them. One of these ingredients turns up in wheat perfume, but the wheat perfume also contains a substance that repels dodder sprouts. This chemical could offer farmers one way to fight the vine and save their crops.óC. Gramling

Stalking Plants by Scent
Stalking Plants by Scent

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