Questões do ENEM 2021
Questões aplicadas na prova de 2021, cada uma em página própria com enunciado, alternativas e gabarito.
Resultados
2.649 questões encontradas. Mostrando a página 66 de 133.
D83DD4EA-0A Rachel Carson (1907-1964) foi uma bióloga inglesa que escreveu o livro Primavera Silenciosa, no qual alertou sobre os riscos do uso de inseticidas bioacumuladores, em especial o Dicloro Difenil Tricloroetano (DDT). Com base nessa informação e nos conhecimentos sobre ecologia, é correto afirmar que o DDTD83980A7-0A Biologia
FotossínteseUECE · 2021FácilEntre para guardar nos favoritosSabendo-se que a clorofila é um pigmento verde, é correto concluir que a menor taxa fotossintética ocorre na presença da luz de corD834AD5B-0A Biologia
Identidade dos seres vivosUECE · 2021Muito fácilEntre para guardar nos favoritosConsiderando os achados científicos a respeito do coronavírus que são propagados por biólogos, infectologistas, imunologistas, dentre outros cientistas, e veiculados pelos diversos meios de comunicação, analise as proposições apresentadas a seguir e numere os parênteses abaixo de acordo com a seguinte indicação:1. mito;2. verdade.( ) Crianças não podem contrair o coronavírus.( ) Idosos que contraem a infecção pelo coronavírus tendem a desenvolver quadros respiratórios mais graves.( ) Antibióticos são eficazes apenas contra bactérias, não contra vírus.( ) As vacinas contra a COVID-19 infectam pessoas com o vírus do HIV.( ) A vacina da gripe H1N1 previne contra a Covid-19.A sequência correta, de cima para baixo, é:
D830810E-0A Biologia
Moléculas, células e tecidosUECE · 2021FácilEntre para guardar nos favoritosRelacione, corretamente, as organelas apresentadas a seguir com suas respectivas funções, numerando a coluna II de acordo com a coluna I.Coluna I1. Lisossomo2. Peroxissomo3. Retículo endoplasmático rugoso4. Retículo endoplasmático liso5. Complexo golgienseColuna II( ) Síntese de proteínas( ) Síntese de lipídeos( ) Secreção celular( ) Digestão celular( ) Desintoxicação celularA sequência correta, de cima para baixo, é:
D82CA4A8-0A Biologia
Identidade dos seres vivosUECE · 2021FácilEntre para guardar nos favoritosAssinale a opção que preenche corretamente a lacuna do seguinte enunciado: “Entre as doenças humanas causadas por __________________ , é correto citar amebíase, tricomoníase, toxoplasmose, leishmaniose, doença de Chagas e malária”.D82566DC-0A Biologia
Moléculas, células e tecidosUECE · 2021MédioEntre para guardar nos favoritosObserve as seguintes afirmações sobre células, seus componentes e teoria celular:I. As células são unidades funcionais dos organismos celulares, uma vez que diversos processos vitais ocorrem no interior dessas estruturas.II. A compreensão da teoria celular foi possível devido à fabricação dos microscópios. Os microscópios eletrônicos permitem aumento cerca de 1.500 vezes e, nos microscópios de luz/ópticos, o aumento é da ordem de cerca de 100 mil vezes.III. De acordo com a teoria da endossimbiose, o surgimento de células eucarióticas foi consequência de incorporações simbióticas de diferentes células procarióticas.É correto o que se afirma emD8214038-0A Biologia
A química da vidaUECE · 2021Muito fácilEntre para guardar nos favoritosAtente para o que se diz a seguir sobre a água e suas propriedades, e escreva V ou F conforme seja verdadeiro ou falso.( ) Por ser um solvente eficiente, a água é o meio no qual ocorre a maioria das reações químicas.( ) Por ser apolar, o óleo de cozinha não forma ligações de hidrogênio com as moléculas de água e não é dissolvido por ela.( ) A maioria dos compostos orgânicos não se mistura com a água porque são apolares. Um exemplo é o sal de cozinha que, por ser apolar, é uma substância hidrofóbica.( ) A tensão superficial explica o fato de alguns insetos se locomoverem sobre a superfície da água.Está correta, de cima para baixo, a seguinte sequência:D81D6C47-0A Biologia
Gimnospermas e AngiospermasUECE · 2021MédioEntre para guardar nos favoritosNo que diz respeito às angiospermas, escreva V ou F conforme seja verdadeiro ou falso o que se afirma nos itens abaixo.( ) Sua fase duradoura é denominada gametófito e sua fase temporária é denominada esporófito.( ) Apresentam flores e frutos.( ) Podem existir no solo, no mar e em água doce.( ) Suas sementes têm uma estrutura chamada cotilédone.Está correta, de cima para baixo, a seguinte sequência:D819C6EB-0A Biologia
Ecologia e ciências ambientaisUECE · 2021Muito fácilEntre para guardar nos favoritosPopulação é definida como o conjunto deD815DC77-0A Biologia
Ecologia e ciências ambientaisUECE · 2021Muito fácilEntre para guardar nos favoritosEm relação às interações ecológicas, assinale a afirmação verdadeira.D8125285-0A Biologia
Identidade dos seres vivosUECE · 2021FácilEntre para guardar nos favoritosSobre os anfíbios, é INCORRETO afirmar que sãoD80DA11F-0A Biologia
Anelídeos e MoluscosUECE · 2021MédioEntre para guardar nos favoritosEm relação aos moluscos, escreva V ou F conforme seja verdadeiro ou falso o que se afirma nos itens abaixo.( ) Na boca dos moluscos, com exceção dos bivalves, existe a rádula que é formada por dentículos quitinosos com os quais raspam o alimento.( ) Os cefalópodes respiram por brânquias e apresentam cabeça muito desenvolvida e tentáculos.( ) A característica principal dos bivalves é a presença de concha externa e articulada, formada por duas valvas articuladas que protegem o animal.( ) Os gastrópodes constituem o grupo mais diversificado de moluscos e possuem representantes como caracóis, caramujos, polvos e lesmas.Está correta, de cima para baixo, a seguinte sequência:D80981B1-0A Biologia
Briófitas e PteridófitasUECE · 2021FácilEntre para guardar nos favoritosConsiderando as características das briófitas e pteridófitas, numere os parênteses abaixo de acordo com a seguinte indicação:1. briófitas;2. pteridófitas.( ) Seu tamanho está associado à ausência de vasos para a condução dos nutrientes, os quais são transportados de célula a célula por todo o vegetal.( ) Samambaias, avencas, xaxins e cavalinhas são alguns dos seus representantes mais conhecidos.( ) Os musgos e as hepáticas são seus principais representantes.( ) Foram os primeiros vegetais a apresentar um sistema de vasos para conduzir nutrientes.A sequência correta, de cima para baixo, é:D805E86C-0A Biologia
Hereditariedade e diversidade da vidaUECE · 2021FácilEntre para guardar nos favoritosAssinale a opção que corresponde a doenças humanas classificadas como hereditárias.D801ECB1-0A Biologia
Características dos seres vivosUECE · 2021MédioEntre para guardar nos favoritosNo que concerne aos reinos dos seres vivos, escreva V ou F conforme seja verdadeiro ou falso o que se afirma nos itens abaixo.( ) As plantas são eucariontes, multicelulares e quimiossintetizantes, com o corpo organizado em tecidos.( ) Os protozoários são unicelulares, eucariontes e autótrofos.( ) O reino dos fungos é formado por seres eucariontes e heterótrofos, existindo representantes unicelulares e multicelulares.( ) As algas são eucariontes, autótrofas e podem ser uni ou multicelulares, mas não formam tecidos.Está correta, de cima para baixo, a seguinte sequência:D7FE95C7-0A Biologia
Embriologia humanaUECE · 2021MédioEntre para guardar nos favoritosSobre os anexos embrionários, é correto afirmar queD7FAF6D9-0A Biologia
Identidade dos seres vivosUECE · 2021FácilEntre para guardar nos favoritosConsiderando as características dos sistemas humanos, numere os parênteses abaixo de acordo com a seguinte indicação:1. esquelético;2. respiratório;3. circulatório;4. nervoso.( ) Envolvido na proteção dos órgãos internos, nos movimentos e na sustentação do corpo.( ) Controla as contrações musculares e o funcionamento das vísceras, coordena os movimentos cardiorrespiratórios e a secreção de hormônios pelas glândulas endócrinas.( ) Captura o oxigênio necessário para as células do corpo e elimina o gás carbônico.( ) Possibilita recolher e transportar os resíduos do metabolismo e o gás carbônico produzidos pelas células; transportar e distribuir nutrientes, oxigênio, hormônios, etc.A sequência correta, de cima para baixo, é:B11B9B27-0A Inglês
Interpretação de texto | Reading comprehensionUECE · 2021MédioEntre para guardar nos favoritosT E X T
Britain, Norway and the United States join forces with businesses to protect tropical forests.
Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.
The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.
Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.
“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”
An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.
The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.
Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.
Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.
From: www.nytimes.com/April 22, 2021
As for the companies which will be part of the LEAF coalition, they must have the commitment toB1173DC3-0A Inglês
Interpretação de texto | Reading comprehensionUECE · 2021MédioEntre para guardar nos favoritosT E X T
Britain, Norway and the United States join forces with businesses to protect tropical forests.
Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.
The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.
Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.
“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”
An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.
The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.
Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.
Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.
From: www.nytimes.com/April 22, 2021
Still about the countries which will receive financial support from the coalition to reduce emissions and deforestation, the text mentions that they willB11313D0-0A Inglês
Interpretação de texto | Reading comprehensionUECE · 2021FácilEntre para guardar nos favoritosT E X T
Britain, Norway and the United States join forces with businesses to protect tropical forests.
Britain, Norway and the United States said Thursday they would join forces with some of the world’s biggest companies in an effort to rally more than $1 billion for countries that can show they are lowering emissions by protecting tropical forests. The goal is to make intact forests more economically valuable than they would be if the land were cleared for timber and agriculture.
The initiative comes as the world loses acre after acre of forests to feed global demand for soy, palm oil, timber and cattle. Those forests, from Brazil to Indonesia, are essential to limiting the linked crises of climate change and a global biodiversity collapse. They are also home to Indigenous and other forest communities. Amazon, Nestlé, Unilever, GlaxoSmithKline and Salesforce are among the companies promising money for the new initiative, known as the LEAF Coalition.
Last year, despite the global downturn triggered by the pandemic, tropical deforestation was up 12 percent from 2019, collectively wiping out an area about the size of Switzerland. That destruction released about twice as much carbon dioxide into the atmosphere as cars in the United States emit annually.
“The LEAF Coalition is a groundbreaking example of the scale and type of collaboration that is needed to fight the climate crisis and achieve net-zero emissions globally by 2050,” John Kerry, President Biden’s senior climate envoy, said in a statement. “Bringing together government and privatesector resources is a necessary step in supporting the large-scale efforts that must be mobilized to halt deforestation and begin to restore tropical and subtropical forests.”
An existing global effort called REDD+ has struggled to attract sufficient investment and gotten mired in bureaucratic slowdowns. This initiative builds on it, bringing private capital to the table at the country or state level. Until now, companies have invested in forests more informally, sometimes supporting questionable projects that prompted accusations of corruption and “greenwashing,” when a company or brand portrays itself as an environmental steward but its true actions don’t support the claim.
The new initiative will use satellite imagery to verify results across wide areas to guard against those problems. Monitoring entire jurisdictions would, in theory, prevent governments from saving forestland in one place only to let it be cut down elsewhere.
Under the plan, countries, states or provinces with tropical forests would commit to reducing deforestation and degradation. Each year or two, they would submit their results, calculating the number of tons of carbon dioxide reduced by their efforts. An independent monitor would verify their claims using satellite images and other measures. Companies and governments would contribute to a pool of money that would pay the national or regional government at least $10 per ton of reduced carbon dioxide.
Companies will not be allowed to participate unless they have a scientifically sound plan to reach net zero emissions, according to Nigel Purvis, the chief executive of Climate Advisers, a group affiliated with the initiative. “Their number one obligation to the world from a climate standpoint is to reduce their own emissions across their supply chains, across their products, everything,” Mr. Purvis said. He also emphasized that the coalition’s plans would respect the rights of Indigenous and forest communities.
From: www.nytimes.com/April 22, 2021
Countries that will benefit from the investments of the LEAF coalition, will have to