A) Large wood-yielding trees of the tropical forests B) Plants in marshy areas with breathing roots C) Succulent plants that can thrive in arid / desert areas D) Vast grassland areas interspersed with deciduous trees and thorny bushes Answer (Select an option above to get the answer):
A) are used in warming plant growth chambers B) help in maintaining atmospheric O2 and CO2 balance C) are produced by green photosynthesizing plants and are trapped in the Earths atmosphere D) prevent the escape of heat waves reradiated from the Earths surface Answer (Select an option above to get the answer):
(Single Best Answer) Question 27: The chemical substance Taxol is said to have curative value for malignant tumors. It is obtained from the ?
A) shoots of Taxodium sp. B) roots and fruits of Taxodium sp. C) bark from stems of Taxus sp. D) roots of Taxus sp. Answer (Select an option above to get the answer):
(Single Best Answer) Question 28: In the hills, the soil erosion takes place due to paid flow of rain water. It can be most effectively controlled by ?
A) building dykes B) channelizing the water C) jhum cultivation D) terrace cultivation Answer (Select an option above to get the answer):
A) interfere directly with bacterial cell wall synthesis B) increase cell membrane permeability to specific ions C) inhibit both transcription and translation D) inhibit electrophoretic separation of ions Answer (Select an option above to get the answer):