Foram encontradas 137 questões.
Pesquisadores observaram que pessoas cujos
ancestrais viveram em climas quentes e úmidos têm
tendência a apresentar narizes maiores, em
comparação com pessoas descendentes de
populações de regiões frias e secas. De acordo com o
estudo, os narizes mais estreitos observados em
residentes de regiões frias e secas são vantajosos
nestas áreas, já que permitem ampliar a umidade do ar
ao aquecê-lo.
Fonte: http://g1.globo.com/ciencia-e-saude/noticia/clima-na-terrainfluenciou-formato-do-nariz-segundo-estudo.ghtml
Com base nesta pesquisa e nos aspectos evolutivos que possam ter contribuído para tais características, considere as afirmativas abaixo. 1) A seleção natural influencia o formato do nariz na população humana, favorecendo narizes estreitos em climas frios e secos. 2) A latitude em que vivem pessoas de diferentes regiões geográficas influencia na forma do nariz, sendo esta caracteristica produto da adaptação. 3) O formato do nariz evoluiu ao acaso por meio de mutações e mecanismos relacionados à deriva genética e ao isolamento geográfico.
Está(ão) correta(s):
Fonte: http://g1.globo.com/ciencia-e-saude/noticia/clima-na-terrainfluenciou-formato-do-nariz-segundo-estudo.ghtml
Com base nesta pesquisa e nos aspectos evolutivos que possam ter contribuído para tais características, considere as afirmativas abaixo. 1) A seleção natural influencia o formato do nariz na população humana, favorecendo narizes estreitos em climas frios e secos. 2) A latitude em que vivem pessoas de diferentes regiões geográficas influencia na forma do nariz, sendo esta caracteristica produto da adaptação. 3) O formato do nariz evoluiu ao acaso por meio de mutações e mecanismos relacionados à deriva genética e ao isolamento geográfico.
Está(ão) correta(s):
Provas
Questão presente nas seguintes provas
Na evolução dos organismos, a origem da fotossíntese
foi determinante para produzir a diversidade biológica
hoje existente na Terra. Este processo bioquímico
ocorre em várias etapas e
1) depende da absorção de luz por moléculas de
clorofila localizadas nas membranas dos
tilacoides.
2) leva à redução de NADP+ a NADPH, converte
CO2 em glicídios e gera ATP.
3) gera produto que participa da cadeia de
transporte de elétrons em mitocôndrias humanas.
Está(ão) correta(s):
Está(ão) correta(s):
Provas
Questão presente nas seguintes provas
Considere os tecidos epiteliais na figura abaixo e
assinale a alternativa na qual a correspondência, entre
o órgão e o respectivo tipo de tecido, está correta.
Provas
Questão presente nas seguintes provas
Cerca de 85% dos brasileiros possuem sangue com
fator Rh positivo (Rh+). Considerando os genótipos RR
ou Rr para pessoas Rh+, a frequência do genótipo rr e
do alelo r, na população brasileira é, respectivamente:
Provas
Questão presente nas seguintes provas
A captura e a comercialização do guaiamum estão
proibidas desde o dia 6 de março de 2017, por força
de duas portarias do Ministério do Meio Ambiente do
Brasil. Apesar desta decisão ter por objetivo diminuir o
risco de extinção desse crustáceo, não é possível
concluir que:
Provas
Questão presente nas seguintes provas
A amebíase é uma doença comum no Brasil, causada
pelo protozoário Entamoeba histolytica. São
características desse parasita:
Provas
Questão presente nas seguintes provas
Read the text below and answer the following question based on it.
Natural tooth repair method, using Alzheimer's drug, could revolutionise dental treatments
A new method of stimulating the renewal of living stem cells in tooth pulp using an Alzheimer’s drug has been discovered by a team of researchers at King’s College London.
Following trauma or an infection, the inner, soft pulp of a tooth can become exposed and infected. In order to protect the tooth from infection, a thin band of dentine is naturally produced and this seals the tooth pulp, but it is insufficient to effectively repair large cavities. Currently dentists use manmade cements or fillings, such as calcium and silicon-based products, to treat these larger cavities and fill holes in teeth. This cement remains in the tooth and fails to disintegrate, meaning that the normal mineral level of the tooth is never completely restored.
However, in a paper published today in Scientific Reports, scientists from the Dental Institute at King’s College London have proven a way to stimulate the stem cells contained in the pulp of the tooth and generate new dentine in large cavities, potentially reducing the need for fillings or cements.
The novel biological approach could see teeth use their natural ability to repair large cavities rather than using cements or fillings.
Significantly, one of the small molecules used by the team to stimulate the renewal of the stem cells included Tideglusib, which has previously been used in clinical trials to treat neurological disorders including Alzheimer’s disease.
Using biodegradable collagen sponges to deliver the treatment, the team applied low doses of small molecule glycogen synthase kinase (GSK-3) inhibitors to the tooth. They found that the sponge degraded over time and that new dentine replaced it, leading to complete, natural repair. Collagen sponges are commercially-available and clinicallyapproved, again adding to the potential of the treatment’s swift pick-up and use in dental clinics.
Disponível em:
Provas
Questão presente nas seguintes provas
Read the text below and answer the following question based on it.
Most Teenagers happy with their lives but
schoolwork anxiety and bullying an issue
Most teenagers happy with their lives but schoolwork
anxiety and bullying an issue
Teenagers who feel part of a school community and enjoy
good relations with their parents and teachers are more
likely to perform better academically and be happier with
their lives, according to the first OECD PISA assessment of
students’ well-being.
PISA 2015 Results analyses for the first time students’
motivation to perform well in school, their relationships with
peers and teachers, their home life, and how they spend
their time outside of school. The findings are based on a
survey of 540,000 students in 72 participating countries and
economies who also completed the main OECD PISA 2015
test on science, mathematics and reading.
Many students are very anxious about school work and
tests and the analysis reveals this is not related to the
number of school hours or the frequency of tests but with
how supportive they feel their teachers and schools to be:
on average across OECD countries, 59% of students
reported they often worry that taking a test will be difficult,
and 66% reported feeling stressed about poor grades.
Some 55% of students say they are very anxious for a test
even if they are well prepared. In all countries, girls reported
greater schoolwork-related anxiety than boys; and anxiety
about schoolwork, homework and tests is negatively related
to performance.
Teachers play a big role in creating the conditions for
students’ well-being at school and governments should not
define the role of teachers solely through the number of
instruction hours. Happier students tend to report positive
relations with their teachers. Students in schools where life
satisfaction is above the national average reported a higher
level of support from their teacher than students in schools
where life satisfaction is below average.
“These findings show how teachers, schools and parents
can make a real difference to children’s well-being,”
said OECD Chief of Staff Gabriela Ramos, launching the
report in London. “Together they can help young people
develop a sense of control over their future and the
resilience they need to be successful in life. There is no
secret, you perform better if you feel valued, if you feel well
treated, if you are given a hand to succeed!”
Adaptado de:
Acessado em 19 de abril de 2017.
Provas
Questão presente nas seguintes provas
Read the text below and answer the following question based on it.
Most Teenagers happy with their lives but
schoolwork anxiety and bullying an issue
Most teenagers happy with their lives but schoolwork
anxiety and bullying an issue
Teenagers who feel part of a school community and enjoy
good relations with their parents and teachers are more
likely to perform better academically and be happier with
their lives, according to the first OECD PISA assessment of
students’ well-being.
PISA 2015 Results analyses for the first time students’
motivation to perform well in school, their relationships with
peers and teachers, their home life, and how they spend
their time outside of school. The findings are based on a
survey of 540,000 students in 72 participating countries and
economies who also completed the main OECD PISA 2015
test on science, mathematics and reading.
Many students are very anxious about school work and
tests and the analysis reveals this is not related to the
number of school hours or the frequency of tests but with
how supportive they feel their teachers and schools to be:
on average across OECD countries, 59% of students
reported they often worry that taking a test will be difficult,
and 66% reported feeling stressed about poor grades.
Some 55% of students say they are very anxious for a test
even if they are well prepared. In all countries, girls reported
greater schoolwork-related anxiety than boys; and anxiety
about schoolwork, homework and tests is negatively related
to performance.
Teachers play a big role in creating the conditions for
students’ well-being at school and governments should not
define the role of teachers solely through the number of
instruction hours. Happier students tend to report positive
relations with their teachers. Students in schools where life
satisfaction is above the national average reported a higher
level of support from their teacher than students in schools
where life satisfaction is below average.
“These findings show how teachers, schools and parents
can make a real difference to children’s well-being,”
said OECD Chief of Staff Gabriela Ramos, launching the
report in London. “Together they can help young people
develop a sense of control over their future and the
resilience they need to be successful in life. There is no
secret, you perform better if you feel valued, if you feel well
treated, if you are given a hand to succeed!”
Adaptado de:
Acessado em 19 de abril de 2017.
Provas
Questão presente nas seguintes provas
Read the text below and answer the following question based on it.
Most Teenagers happy with their lives but
schoolwork anxiety and bullying an issue
Most teenagers happy with their lives but schoolwork
anxiety and bullying an issue
Teenagers who feel part of a school community and enjoy
good relations with their parents and teachers are more
likely to perform better academically and be happier with
their lives, according to the first OECD PISA assessment of
students’ well-being.
PISA 2015 Results analyses for the first time students’
motivation to perform well in school, their relationships with
peers and teachers, their home life, and how they spend
their time outside of school. The findings are based on a
survey of 540,000 students in 72 participating countries and
economies who also completed the main OECD PISA 2015
test on science, mathematics and reading.
Many students are very anxious about school work and
tests and the analysis reveals this is not related to the
number of school hours or the frequency of tests but with
how supportive they feel their teachers and schools to be:
on average across OECD countries, 59% of students
reported they often worry that taking a test will be difficult,
and 66% reported feeling stressed about poor grades.
Some 55% of students say they are very anxious for a test
even if they are well prepared. In all countries, girls reported
greater schoolwork-related anxiety than boys; and anxiety
about schoolwork, homework and tests is negatively related
to performance.
Teachers play a big role in creating the conditions for
students’ well-being at school and governments should not
define the role of teachers solely through the number of
instruction hours. Happier students tend to report positive
relations with their teachers. Students in schools where life
satisfaction is above the national average reported a higher
level of support from their teacher than students in schools
where life satisfaction is below average.
“These findings show how teachers, schools and parents
can make a real difference to children’s well-being,”
said OECD Chief of Staff Gabriela Ramos, launching the
report in London. “Together they can help young people
develop a sense of control over their future and the
resilience they need to be successful in life. There is no
secret, you perform better if you feel valued, if you feel well
treated, if you are given a hand to succeed!”
Adaptado de:
Acessado em 19 de abril de 2017.
The findings suggest that students’ well-being also depend on their teachers’
Provas
Questão presente nas seguintes provas
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