346: Sparkling red colour after the blast of fire crackers is due to the presence of:
(a) Strontium
(b) Sodium
(c) Sulphur
(d) Magnesium
347: Among the four works mentioned below which one is encyclopaedic in nature?
(a) Amarakosa
(b) Siddhantasiromani
(c) Brhat Samhita
(d) Ashtangahrdaya
348: The Panchayati Raj was first introduced in the States of Rajasthan and
(a) Andhra Pradesh
(b) Bihar
(c) Gujarat
(d) Orissa
349: Many transplanted seedlings do not grow because
(a) the new soil does not contain favourable minerals
(b) most of the root hairs grip the new soil too hard
(c) most of the root hairs are lost during transplantation
(d) leaves get damaged during transplantation
350: Which one of the following is the best description of the term 'ecosystem'?
(a) A community of organisms interacting with one another.
(b) That part of the Earth which is inhabited by living organisms.
(c) A community of organisms together with the environment in which they live
(d) The flora and fauna of a geographical area