Warning: Undefined variable $ext in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/show-hidecollapse-expand/bg_show_hide.php on line 281

Warning: Undefined variable $ext in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/show-hidecollapse-expand/bg_show_hide.php on line 281

Warning: Undefined variable $ext in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/show-hidecollapse-expand/bg_show_hide.php on line 281

Warning: Undefined variable $ext in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/show-hidecollapse-expand/bg_show_hide.php on line 281

Warning: Undefined variable $ext in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/show-hidecollapse-expand/bg_show_hide.php on line 281

1. The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

A. Azotobacter
B. Clostridium
C. considerably less important in comparison to the symbiotic bacteria
D. all of the above

Show Answer

2.  Nitrogen fixation by the microorganisms can be detected by adopting the approach of

A. demonstrating growth in a nitrogen free medium
B. cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen
C. measuring¹⁵N₂ by mass spectrometer
D. all of the above

Show Answer

3. Which of the following is not the biofertilizer producing bacteria?

A. Nostoc
B. Anabaena
C. Both (a) and (b)
D. Clostridium

Show Answer

4. Which of the following is capable of oxidizing sulfur to sulfates?

A. Thiobacillus thiooxidans
B. Desulfotomaculum
C. Rhodospirillum
D. Rhodomicrobium

Show Answer

5. Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

A. ingestion of bacteria
B. ingestion of mold
C. ingestion of fungi
D. all of these

Show Answer
Warning: Undefined variable $in_same_cat in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/EXP.GKFEED.COM/function.php on line 27

Warning: Undefined variable $excluded_categories in /www/wwwroot/gkfeed.com/public_html/wp-content/plugins/EXP.GKFEED.COM/function.php on line 27