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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Biology

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Biology
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What is lac?

[11] Enhancement of Food Production
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Identify the appropriate term for the number of births under ideal conditions:

[13] Organisms and Populations
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Explain the term Emigration.

[13] Organisms and Populations
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Which day is observed as ‘World Environment Day’?

[13] Organisms and Populations
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How CO2 makes idlies puffy?

[4] Molecular Basis of Inheritance
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During .............. typs of interaction, both organisms are benefited

  1. mutualism
  2. competition
  3. commensalism
  4. parasitism
[13] Organisms and Populations
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______ enzymes are used as biological scissors in r-DNA technology.

[4] Molecular Basis of Inheritance
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What is the correct sequence of the stages in bacteriophage lytic cycle?

(A) Attachment, Penetration, Lysis, Multiplication

(B) Attachment, Penetration, Multiplication, Lysis

(C) Lysis, Penetration, Multiplication, Attachment

(D) Attachment, Lysis, Multiplication, Penetration

[4] Molecular Basis of Inheritance
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Give the role of VAM related to soil fertility.

[13] Organisms and Populations
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Explain the semi-conservative replication of eukaryotic DNA.

[4] Molecular Basis of Inheritance
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An orchid plant is growing on the branch of a mango tree. How do you describe this interaction between the orchid and the mango tree?

[13] Organisms and Populations
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What is the ecological principle behind the biological control method of managing with pest insects?

[13] Organisms and Populations
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Define the following term:

Commensalism

[13] Organisms and Populations
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Explain replication of bacteriophage with the help of a suitable diagram.

[4] Molecular Basis of Inheritance
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What is Bacteriophage?

[4] Molecular Basis of Inheritance
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As the base sequence present on one strand of DNA decides the base sequence of other strands; this strand is considered as ______.

[4] Molecular Basis of Inheritance
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Competition and Mutualism.

[13] Organisms and Populations
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Define the Stenothermal organisms.

[13] Organisms and Populations
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Mule is the outcome of __________________.

[11] Enhancement of Food Production
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What is the breed?

[11] Enhancement of Food Production
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