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
The leaf parts gets modified into spines in order to
Reduce transpiration
Reduce surface area
Protect the plant from grazing animals
All of the above
A mutation in a plant affects the development of its palisade parenchyma, significantly reducing the number and length of these cells. Which of the following would be the MOST DIRECT consequence of this mutation on photosynthesis?
Increased rate of photorespiration due to higher oxygen concentration.
Reduced CO2 fixation by RuBisCO in the mesophyll cells.
Decreased light absorption and reduced efficiency of the light-dependent reactions.
Impaired transport of sugars from the source to the sink.
Study the following statements and choose the correct option I.Buds are present in the axil of leaflets of the compound leaf II.Pulvinus leaf-base is present in some leguminous plants. III.In Alstonia, the petioles expand, become green and synthesize food IV.Opposite phyllotaxy is seen in guava
II and IV are correct but I and III are wrong
I and III are correct but II and IV are wrong
I and IV are correct but II and III are wrong
II, III and IV are correct but I is wrong
The leaves are modified into spines in
Nepenthes
Opuntia
Australian Acacia
Utricularia
In cauliflower, the inflorescence is
A branched cluster of yellow flowers.
Modified into a compact, white head composed of undeveloped flower buds.
A single large flower surrounded by green sepals.
A long, trailing vine with small white flowers.
Which of these is a leaf modification and NOT a stem modification?
Tendrils
Cladodes
Thorns
Phyllodes
Wringed petioles are characteristic of
Polygonum
Citrus
Neem
Banana
The circinate vernation is the characteristic feature of ferns. It refers to
Coiling of young leaves
Arrangement of leaves on stem
Attachment of sori on leaves
Heterophily
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
Identify the structure that does NOT originate from a modified stem.
Thorns
Tubers
Bulbs
Spines
