Questões - UEFS 2012 | Gabarito e resoluções

Like a black light poster come to life, a group of bioluminescent fungi collected from Ribeira Valley Tourist State Park near São Paulo, Brazil, emanates a soft green glow when the lights go out. The mushrooms are part of 5 the genus Mycena, a group that includes about 500 species worldwide. Of these only 33 are known to be bioluminescent capable of producing light through a chemical reaction. Since 2002, Cassius Stevani, professor of Chemistry 10 at the University of São Paulo, Dennis Desjardin, professor of mycology at San Francisco State University in California, and Marina Capelari of Brazils Institute of Botany have discovered 10 more bioluminescent fungi species four of which are new to science in Brazils 15 tropical forests. The work, Stevani says, has increased the number of glowers known since the 1970s by 30 percent. In addition to mushrooms, a variety of marine animals, select species of bacteria, insects, and annelids 20 (earthworms) are known to be bioluminescent. Bioluminescence creates cold light emissions with low thermal radiation. An enzyme called luciferase triggers a pigment called luciferin to oxidize, and the reaction emits light. But why the fungi evolved to glow 25 this way remains a mystery, Stevani says. To get the green glow of the new specimens of bioluminescent mushrooms, Dr Desjardin and Dr Stevani had to go out on new moon nights and stumble around in the forest, running into trees, while keeping an eye out for poisonous 30 snakes and prowling jaguars. Besides helping researchers decipher how and why mushrooms glow, Stevani is studying the bioluminescent fungis ability to signal the presence of toxins in the soil. In the lab, his team has developed a procedure that 35 shows that fungi emit less light when exposed to several metals and organic pollutants. In a near future we can use it to evaluate the toxicity of environmental samples of soil and sediments, Stevani said in an email to National Geographic News. The researcher also says 40 that the fungi could serve as a tool for bioremediation (cleanup using living organisms) of contaminated soil. New glowing mushrooms found in Brazil. Disponível em: . Acesso em: The expression keeping an eye out for (l. 29) is nearest in meaning to

Um projétil é lançado obliquamente a partir do solo horizontal com velocidade V0, cujo módulo é igual a 108,0km/h, segundo um ângulo , conforme a figura. Considerando-se o módulo da aceleração da gravidade igual a 10,0m/s2, sen = 0,6, cos = 0,8 e desprezando-se a resistência do ar, a altura máxima atingida pelo projétil e o seu alcance horizontal correspondem, respectivamente, a

No campo elétrico criado por uma esfera eletrizada com carga Q, o potencial varia com a distância ao centro dessa esfera, conforme o gráfico. Considerando-se a constante eletrostática do meio igual a 1,0.1010N.m2/C2, a carga elétrica, em Coulomb, existente na esfera é igual a

A partir da análise dos climogramas e dos conhecimentos sobre as paisagens climatobotânicas do Brasil, pode-se afirmar:

De acuerdo con la viñeta (cuadro II), se puede concluir que los estudiantes de hoy

(UEFS - 2012) Like a black light poster come to life, a group of bioluminescent 1fungi collected from Ribeira Valley Tourist State Park near So Paulo, Brazil, emanates a soft green glow when the lights go out. The mushrooms are part of 5 the genus Mycena, a group that includes about 500 species worldwide. Of 2these only 33 are known to be bioluminescent capable of producing light through a chemical reaction. Since 2002, Cassius Stevani, professor of Chemistry 10 at the University of So Paulo, Dennis Desjardin, professor of mycology at San Francisco State University in California, and Marina Capelari of Brazils Institute of Botany have discovered 10 more bioluminescent fungi species four of which are new to science in Brazils 15 tropical forests. The work, Stevani says, has increased the number of glowers known since the 1970s by 30 percent. In addition to mushrooms, a variety of marine animals, select species of 3bacteria, insects, and annelids 20 (earthworms) are known to be bioluminescent. Bioluminescence creates cold light emissions with low thermal radiation. An enzyme called luciferase triggers a pigment called luciferin to oxidize, and the reaction emits light. But why the fungi evolved to glow 25 4this way remains a mystery, Stevani says. To get the green glow of the new specimens of bioluminescent mushrooms, Dr Desjardin and Dr Stevani had to go out on new moon nights and stumble around in the forest, running into trees, while keeping an eye out for poisonous 30 snakes and prowling jaguars. Besides helping researchers decipher how and why mushrooms glow, Stevani is studying the bioluminescent fungis ability to signal the presence of 5toxins in the soil. In the lab, his team has developed a procedure that 35 shows that fungi emit less light when exposed to several metals and organic pollutants. In a near future we can use it to evaluate the toxicity of environmental samples of soil and sediments, Stevani said in an email to National Geographic News. The researcher also says 40 that the fungi could serve as a tool for bioremediation (cleanup using living organisms) of contaminated soil. New glowing mushrooms found in Brazil. Disponvel em: . Acesso em: The only singular word is in alternative

De la lectura de la viñeta, se puede inferir que los padres de hace cuatro décadas

Aplicando os conceitos de morfoestrutura, morfoescultura e morfoclimática ao território do Brasil, Jurandyr L. S Rosse criou três níveis hierárquicos de classificação do relevo brasileiro. Considerando-se essa informação e os conhecimentos a respeito da mais atual classificação do relevo brasileiro, pode-se afirmar:

Segundo a ONU (Organização das Nações Unidas), metade da população mundial vive em centros urbanos e essa concentração deve aumentar. Por outro lado, a população rural deve crescer e depois começar a cair. Considerando-se essas informações e os conhecimentos sobre o processo de urbanização mundial, é correto afirmar