HS-LS2-8
Evaluate the evidence for the role of group behavior on individual and species' chances to survive and reproduce.
- Health & Medicine
Zebra finches can ‘drink’ water from their own fat
When water is scarce, thirsty zebra finches can produce their own water. They do it by breaking down their body fat.
- Animals
Bee underfeeds eldest daughter, creating ‘nursemaid’
By giving a brood’s firstborn female smaller portions and a low-protein diet, a mother bee can turn the offspring into a nursemaid for her younger siblings.
- Health & Medicine
Mouth germs team up to boost disease risk
The oxygen given off by harmless mouth bacteria can help disease-causing invaders grow strong and flourish.
- Agriculture
Sneaky! Virus sickens plants, but helps them multiply
The cucumber mosaic virus helps tomato plants lure pollinators. When the plants multiply, the virus now gets new hosts.
- Microbes
Staph infections? The nose knows how to fight them
Bacteria living in some people’s noses make a compound that could help fight a nasty type of infection that laughs at other antibiotics.
- Animals
GM mosquitoes cut rate of viral disease in Brazil
Adults males carrying the altered gene cannot father young that survive to adulthood. That’s when they suck blood — and can transmit disease.
- Climate
Climate closing the gender gap for this mountain flower
Among valerian plants, males like it hotter than the females do. So a warming climate has been speeding their migration up once-cool mountainsides.
- Animals
Frigate birds spend months without landing
Frigate birds can fly non-stop for months. They stay in the air with the help of upward-moving airflows, a new study finds.
- Health & Medicine
Scientists Say: Poisonous
A poison-arrow frog is poisonous, but a rattlesnake is not. What’s the difference? It’s how the poison is delivered.
- Animals
This mammal has the world’s slowest metabolism
A sloth species manages to exist with a super-slow metabolism by moving little and using its environment for heating and cooling its body.
- Animals
Singing lemurs sync up — until one goes solo
The indri lemurs of Madagascar sing in chorus to mark their territory. But young males sometimes solo, which may help them attract a mate.
- Chemistry
Scientists Say: Toxin
It is safe to refer to any poison as toxic. But while all toxins are poisonous, most poisons are not toxins.
