
Tarefa semanal 2 (01/09)
Other
2nd Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sobre as variedades, qual é uma característica marcante?
São plantas geneticamente uniformes desde a primeira geração
Resultam do cruzamento de duas linhagens puras
Possuem diversidade genética e polinização natural
Não podem ser replantadas
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é uma desvantagem do uso de híbridos?
Uniformidade das plantas
Vigor híbrido
Resistência a doenças
Custo alto e compra anual
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que caracteriza a primeira geração F1 de híbridos?
Plantas menos produtivas e heterogêneas
Plantas uniformes e vigorosas
Plantas com baixa viabilidade genética
Plantas que podem ser replantadas indefinidamente
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
No processo de obtenção de híbridos, o que resulta da autofecundação sucessiva (6 a 8 gerações)?
Plantas estéreis
Linhagens estáveis
Vigor híbrido imediato
Transgenia espontânea
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das alternativas corresponde a um exemplo de variedade?
Milho Bt (Monsanto)
Arroz IAC 47
Soja RR (Monsanto)
Algodão Bt (Bollgard)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o conceito de plantas transgênicas (OGMs)?
Plantas resultantes do cruzamento de duas linhagens puras
Plantas que recebem genes de outras espécies para adquirir novas características
Plantas que mantêm diversidade genética natural
Plantas resistentes por seleção artificial prolongada
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O Milho Bt contém gene de qual organismo para resistência a insetos?
Vírus do tabaco
Bactéria Bacillus thuringiensis
Fungos micorrízicos
Protozoários do solo
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