11. Fruits stored in a cold chamber exhibit longer storage life because
exposure to sunlight is prevented
concentration of carbon dioxide in the environment is increased
rate of respiration is decreased
there is an increase in humidity
12. Many transplanted seedling do not grow because
the new soil does not contain favourable minerals
most of the root hair grip the new soil too hard
most of the root hairs are lost during transplantation
leaves get damaged during transplantation
13. Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss? 1. Hard and waxy leaves 2. Tiny leaves or no leaves 3. Thorns instead of leaves
Select the correct answer using the codes given below.
1 and 2 only
2 only
1 and 3 only
1, 2 and 3
14. Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss? 1. Hard and waxy leaves 2. Tiny leaves or no leaves 3. Thorns instead of leaves
15. Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to 1. resist drought and increase absorptive area 2. tolerate extremes of pH 3. resist disease infestation
1 only
2 and 3 only