The length of different internodes in a culm of sugarcane is variable because of
shoot apical meristem
position of axillary buds
size of leaf lamina at the node below each internode
size of leaf lamina at the node below each internode
D.
size of leaf lamina at the node below each internode
Intercalary meristem is prsent away from apical meristem in primary permanent tissue. It is present at the base of internodes, eg, in family-Gramineae or at the base of leaves, eg, Pinus or at the base of the node, eg, Mentha. Intercalary meristem is responsible for the increase in length.
The shoot apical meristem present at the apices of the shoot is self-determining and autonomous organising centre. The primary growth and differentiation of primary tissue are entirely due to this meristem as it continuously divides giving rise to new cells. These are the apical meristems that increase the length of the plant but not internodes variability.
Senescence as an active development cellular process in the growth and functioning of a flowering plant is indicated in
vessel and tracheid differentiation
leaf abscission
annual plants
annual plants
Fruit and leaf drop at early stages can be prevented by the application of
Cytokinins
Ethylene
Auxins
Auxins
In germinating seeds fatty acids are degraded exclusively in the
proplastid
glyoxisomes
peroxisomes
peroxisomes
In leaves of C4 -plants malic acid synthesis during CO2 -fixation occurs in
epidermal cells
mesophyll cells
bundle sheath
bundle sheath
The Golgi complex participates in
Fatty acid breakdown
Formation of secretory vesicles
Activation of amino acid
Respiration in bacteria
Which one of the following pairs, is not correctly matched?
Abscisic acid - Stomatal closure
Gibberellic acid - Leaf fall
Cytokinin - Cell division
Cytokinin - Cell division
Pineapple (ananas) fruit develops from
a unilocular polycarpellary flower
a multipistillate syncarpous flower
a cluster of compactly borne flowers on a common axis
a cluster of compactly borne flowers on a common axis
