A plant exhibiting Kranz anatomy experiences a sudden drop in atmospheric CO2 levels. Which of the following is the MOST LIKELY immediate consequence on its photosynthetic efficiency?
Reduced initial fixation of CO2 by PEP carboxylase in mesophyll cells.
Increased oxygenation of RuBisCO in bundle sheath cells.
Immediate cessation of the Calvin cycle in bundle sheath cells.
Enhanced activity of photorespiration in mesophyll cells.
Related Questions
A student collected a hydrophyte with swollen petiole and with a single vascular bundle in the root. The plant which he collected., was
Jussiaea
Trapa
Ceratophyllum
Potamogeton
A Vascular has 300 leaves. 15 % of these belong to mustard 20 % to Calotropis 10 % Guava, 15 % to sunflower and the remaining to Alstonia, if 6 leaves are present at each node of alstonia. Then what is the total number of nodes seen in various twigs present in vasculum?
18
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22
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Australian Acacia, Turmeric, Zaminkind, Neerium, Cacti, Pea, Pistia, Chrysanthemum, Nepenthis, Pine Apple and garlic, out of these how many of them exhibit leaf modifications
6
11
5
7
Which of these is a leaf modification and NOT a stem modification?
Tendrils
Cladodes
Thorns
Phyllodes
In a CAM plant undergoing a prolonged drought, which physiological change would be MOST prominent in its leaves during the daytime?
Stomata open, and CO2 is directly fixed by RuBisCO.
Stomata remain closed, and malate is decarboxylated to release CO2.
Stomata partially open, and PEP carboxylase fixes atmospheric CO2.
Stomata remain closed, and the Calvin cycle ceases completely.
Which specific adaptation in the leaves of submerged hydrophytes contributes MOST significantly to their buoyancy and flexibility in water currents?
Highly dissected leaves
Absence of stomata
Presence of extensive aerenchyma
Thin cuticle
A plant exhibiting Kranz anatomy experiences a sudden drop in atmospheric CO2 levels. Which of the following is the MOST LIKELY immediate consequence on its photosynthetic efficiency?
Reduced initial fixation of CO2 by PEP carboxylase in mesophyll cells.
Increased oxygenation of RuBisCO in bundle sheath cells.
Immediate cessation of the Calvin cycle in bundle sheath cells.
Enhanced activity of photorespiration in mesophyll cells.
