2681: Which of the following statements best describes "carbon fertilization"?
(a) Increased plant growth due to increased concentration of carbon dioxide in the atmosphere
(b) Increased temperature of Earth due to increased concentration of carbon dioxide in the atmosphere
(c) Increased acidity of oceans as a result of increased concentration of carbon dioxide in the atmosphere
(d) Adaptation of all living beings on Earth to the climate change brought about hr the increased concentration of carbon dioxide in the atmosphere
2682: The type of crop which is able to fix nitrogen from air is known as:
(a) Tuber
(b) Coffee
(c) Legume
(d) Wheat
2683: Consider the following international agreements :
1. The International Treaty on Plant Genetic Resources for Food and Agriculture.
2. The United Nations Convention to Combat Desertification.
3. The World Heritage Convention.
Which of the above has/have a bearing on the biodiversity?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
2684: The below table indicates the performance of India in rice and wheat production from 1950-51 to 1995-96. Which of the following conclusions arrived at from the above table would be valid ?
I. Record production of rice as well as wheat has been in 1994-95.
II. The ratio of wheat to rice production seems to have steadily increased over 16 years.
III. Wheat has not been popular among the Indian population before 1980.
IV. India became self-sufficient in rice and wheat only after 1990.
Select the correct answer using the codes given below :
Codes :
(a) I and II
(b) I, II, III and IV
(c) III and IV
(d) None of the above
2685: The chemical name for urea is:
(a) Aneurin
(b) Chloroethene
(c) Carbamide
(d) None of these