Seed germination, phases and rate of growth, conditions of growth
- Given below are two statements :Statement I : The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height.Statement II : Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.In t… Answer: 2. Both Statement I and Statement II are correct. Key idea: Both statements are standard facts about transpiration. Statement I is c... 1
- Match Column - I with Column - II.Column - I | Column - II(a) Nitrococcus | (i) Denitrification(b) Rhizobium | (ii) Conversion of ammonia to nitrite(c) Thiobacillus | (iii) Conversion of nitrite to nitrate(d) Nitrobacter | (iv) Conversion of atmosphe… Answer: 1. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) Match each bacterium with its role: Nitrococcus converts ammonia to nitrite: (a)-(ii). Rhi... 1
- The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is : Answer: 2. Root pressure Key idea: Loss of liquid water from leaf tips at night is guttation, caused by root pressure. At night, with high s... 1
- The process of growth is maximum during : Answer: 1. Log phase Key idea: Growth follows a sigmoid curve and is fastest in the exponential (log) phase. In the lag phase growth is slow... 1