Question

1. microorganisms can be seen with the help of a___________
2. blue green algae fix ____________ directly from air and enhance fertility of soil .​

Answer 1

Explanation:

1.(a) Microorganisms can be seen with the help of a microscope.

(b) Blue green algae fix nitrogen directly from air to enhance fertility of soil.

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Answer 2

The answers of the given questions are as follows -

• Microorganisms can be seen with the help of a microscope.

The microorganisms are extremely small in size and we cannot see them with our naked eyes. In this case we have to use the microscope, to get an extremely magnified image of the small microorganisms.

• Blue green algae fix nitrogen directly from air and enhance fertility of soil.

The nitrogen related compounds are extremely important for the soil. But the nitrogen fixation process is much more complex than the fixation of any other element. The blue green algae fix nitrogen directly from the air into the soil by a series of complex process.