12 Biology Organisms and Populations - Set No : 7 Question No :5
Question No : 5
I. Many
xerophytic plants have thick cuticle on leaf epidermis and sunken stomataII. Some
xerophytic plants have special photosynthetic pathway (CAM) that enables
their stomata close during dayIII.  has spines (modified leaves),
photosynthetic phylloclade (stem)IV. All
adaptations are genetically fixed in all organismsChoose
the combinations of correct option |
| a) | I, II, III and IV | b) | II, III, IV and V |
| c) | III, IV, V and I | d) | I, II, III and V |
Answer No : 5
| (d)All adaptations are not genetically fixed, like behavioural adaptation. Hibernation and aestivation adaptations for avoiding extreme temperature also not genetically fixed |