STD 11 - 1. The living world — NEET STD 11 Science — Question

In bacteria, fungi and lower plants, various kinds of thick walled spores are formed which help them to survive unfavourable conditions, it can be called ...........

Select wrong statement regarding secondary phloem

Heart shaped prothallus of fern bears

Which of the following statements are correct for effect of Carbon dioxide concentration on photosynthesis ?
(i) Increase in concentration up to 0.05 per cent can cause an increase in CO₂ fixation rates; beyond this the levels can become damaging over longer periods
(ii) The C₃ and C₄ plants respond differently to CO₂ concentrations
(iii) At low light conditions neither C₃ nor C₄ responds to high CO₂ conditions
(iv) At high light intensities, both C₃ and C₄ plants show increase in the rates of photosynthesis
(v) C₄ plants show saturation at about 360 µ1L^-1 while C₃ responds to increased CO₂ concentration and saturation is seen only beyond 450 µ1L^-1
(vi) Current availability of CO₂ levels in atmosphere is limiting to the C₃ plants

The annual net primary productivity of the whole biosphere is approximately...

Among rust, smut and mushroom all the three

Assertion: Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids.
Reason: Photolysis of water takes place on the inner side of the membrane.