Identify the blank spaces A, B, C and D in the table given below and select the correct answer. <br> <…

Why does 'Swiss Cheese' develop large holes?</h2></div>

Viruses are defined as</h2></div>

Which of the following is wrongly matched?</h2></div>

Which one of the following is a major constituent of Biogas?</h2></div>

Which one of the following is useful in rice fields?</h2></div>

Mixture of biogas contains</h2></div>

Identify the correct pair of characters of a bacterium which is used in the production of methane.<br> (i)&nbs…