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

What is lac?

Identify the appropriate term for the number of births under ideal conditions:

Explain the term Emigration.

Which day is observed as ‘World Environment Day’?

How CO₂ makes idlies puffy?

During .............. typs of interaction, both organisms are benefited

1. mutualism
2. competition
3. commensalism
4. parasitism

______ enzymes are used as biological scissors in r-DNA technology.

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

Give the role of VAM related to soil fertility.

Explain the semi-conservative replication of eukaryotic DNA.

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?

What is the ecological principle behind the biological control method of managing with pest insects?

Define the following term:

Commensalism

Explain replication of bacteriophage with the help of a suitable diagram.

What is Bacteriophage?

As the base sequence present on one strand of DNA decides the base sequence of other strands; this strand is considered as ______.

Competition and Mutualism.

Define the Stenothermal organisms.

Mule is the outcome of __________________.

What is the breed?