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Tag: "mouths" at biology news

Plants give up answers in the war on bacteria

...gainst disease. Pores called stomata are like tiny mouths that open and close during photosynthesis, exchanging gases. In sunshine, the stomata open. In darkness, they close to conserve water. It has been assumed that these tiny ports were busy with their photosynthesis business and were merely unwitting...

Seeing the serpent

...bout 100 million years ago. Fossils of snakes with mouths big enough to eat those mammals appear at about the same time. Other animals that could have eaten our ancestors, such as big cats, and hawks and eagles, evolved much later. Venomous snakes evolved about 60 million years ago, raising the stakes and...

Study finds that nutritionally enhanced rice reduces iron deficiency

...fied foods also have difficulty making it into the mouths of the hungry and so malnutrition persists. "The fact that biofortified foods can have an impact on nutritional status in humans is an enormously exciting breakthrough," Zeigler noted. "It is time to shift the agricultural research agenda, and the r...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

...ther fish by attaching with their circular, toothy mouths and sucking the body juices. A single lamprey will feed for about a year, consuming on average 40 pounds of fish. In the Great Lakes, their prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fisher...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

...ther fish by attaching with their circular, toothy mouths and sucking the body juices. A single lamprey will feed for about a year, consuming on average 40 pounds of fish. In the Great Lakes, their prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fisher...

Ancient anthropoid origins discovered in Africa

...hapes yield critical clues about the species whose mouths they once occupied. For example, a tooth root from the species Biretia megalopsis is truncated, indicating that it had to make room for the larger eyesocket of a nocturnal animal. "These finds seem to indicate that Biretia megalopsis must have had v...

Restaurant seafood prices since 1850s help plot marine harvests through history

...lves" (Mediterranean monk seals) that filled river mouths in the 14th century became a critically endangered species in the Atlantic today; * How fishing regulations imposed 800 years ago in the Baltic Sea reveal local societies' concerns about the effects of over-fishing. "Ocean historians are creativ...

Genetic discovery could lead to drought-resistant plants

...plant leaves, called stomata, function like little mouths that open and close in response to cues such as li...nvironment. In hot temperatures, plants keep their mouths "shut" longer than usual, to avoid losing gases and water through evaporation. However, they must op...

Bacteria feed on smelly breath (and feet)

...ifference between strains of bacteria found in the mouths of healthy volunteers and those suffering from progressive gum disease (periodontitis), a condition which is often associated with smelly breath. However, no assessment was made of the levels of methylotrophic bacteria present, low levels of which ma...

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