Subject Experts Solutions for Exercise 1: MCQS CORNER
Subject Experts Biology Solutions for Exercise - Subject Experts Solutions for Exercise 1: MCQS CORNER
Attempt the free practice questions from Exercise 1: MCQS CORNER with hints and solutions to strengthen your understanding. MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII solutions are prepared by Experienced Embibe Experts.
Questions from Subject Experts Solutions for Exercise 1: MCQS CORNER with Hints & Solutions
Which of the following statement(s) is/are correct?
Which of the following option includes biofertilizers?
Which of the following is a non-symbiotic biofertilizer?
Nitrogen fixation in root nodules of Alnus is brought about by
Farmers have reported over higher yields of rice by using which of the following biofertilisers?
Match Column I with Column II and select the correct answer from the given codes.
| Column I | Column II | ||
|---|---|---|---|
| Ganga action plan | fixing cyanobacterium | ||
| Bt-cotton | Ministry of environment and forests | ||
| Rhizobium | Insect-resistant plant | ||
| Nostoc | fixing bacterium |
Which of the following statements is/are incorrect?
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
(ii) Anabaena, Nostoc and Oscillatoria are photosynthetic N2-fixing cyanobacteria.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
(iv) BGA adds organic matter to the soil and increase its fertility.
(v) In our country, biofertilisers are not available commercially in the markets for farmers.
Match Column I with Column II and select the correct answer from the given codes.
| Column I | Column II | ||
|---|---|---|---|
| Azolla | Symbiotic N2- fixer | ||
| Rotenone | Symbiotic association with N2- fixing cyanobacteria | ||
| Crotalaria juncea | Natural insecticide | ||
| Frankia | Green manure |
