Graças à reciclagem da matéria, os seres vivos estão em permanentes trocas com o ambiente. Os animais comem as plantas e, quando morrem, seus cadáveres são decompostos por fungos e bactérias, que reciclam a matéria devolvendo-a para a natureza. Se os I fossem eliminados, os II seriam interrompidos, provocando um colapso nos III. Assinale a alternativa correta.

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A nine-year-old boy from the town of Severance in Colorado has successfully campaigned for the repeal of an archaic ban on snowball fights.

The rule was part of an old ordinance outlawing the throwing of missiles, such as stones, at property or people within the town.

Dane Best says he took up the cause on behalf of his friends and classmates.

He delivered a presentation on the subject to a local town board, who backed his message on Monday night.

“The children of Severance want the opportunity to have a snowball fight like the rest of the world,” Dane said during his three-minute presentation,  the Greeley Tribune reports.

“The law was created many years ago. Today’s kids need a reason to play outside.”

His mum said he first learned of the technicality ban during a visit to the town hall of Severance, which is north of Denver.

Kyle Rietkerk, assistant to the Severance town administrator, said “all the kids always get blown away” when they find out it was illegal to throw snowballs there,  AP reports.

“So, what ends up happening is [town leaders] always encourage the kids with, ‘You have the power you can change the law’. No-one has,” he said.

The law itself is thought to date back to the town’s founding about 100 years ago, although no-one is believed to have been charged with the offence.

After the young campaigner’s presentation, the result was unanimous from officials.

When the ban had officially ended, the town’s mayor handed Dane and his four-year-old brother Dax the first legal snowballs in the town’s history.

“We are proud of him for taking initiative to make some change, no matter how small it may be,” Derrick Best, Dane’s father,  told CBS Denver.

The family are said to be now looking at the town’s other unusual laws - including one that only recognises cats and dogs as pets.

Disponível em: www.bbc.com/news/world-us-canada-46439279.

In which phrase is the verb in the bold type in the simple present?

Para uma molécula diatômica, a energia potencial em função da distância internuclear é representada pela figura  ao lado. As linhas horizontais representam os níveis de energia vibracional quanticamente permitidos para uma molécula diatômica. Uma amostra contendo um mol de moléculas diatômicas idênticas, na forma de um sólido cristalino, pode ser modelada como um conjunto de osciladores para os quais a energia potencial também pode ser representada qualitativamente pela figura. Em relação a este sólido cristalino, são feitas as seguintes proposições: 

I. À temperatura de 0 K, a maioria dos osciladores estará no estado vibracional fundamental, cujo número quântico vibracional, n, é igual a zero. 

II. À temperatura de 0 K, todos os osciladores estarão no estado vibracional fundamental, cujo número quântico vibracional, n, é igual a zero.

III. O movimento vibracional cessa a 0 K. IV. O movimento vibracional não cessa a 0 K.

V. O princípio de incerteza de Heisenberg será violado se o movimento vibracional cessar. 

Das proposições acima estão CORRETAS

(FAMERP) Analise a figura, que ilustra, de maneira esquemática, a disposição das moléculas de fosfolipídios presentes em alguns componentes celulares.

Em células eucarióticas, tal disposição de fosfolipídios é encontrada