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
B.
leaf abscission
Senescence can be defined as the sum of deteriorative processes, which naturally terminate the functional life of an organism. Senescence is not confined only to the whole plant, it may be limited to a particular plant organ such as leaf and flower or cells such as phloem and xylem. Abscission is the natural shedding of leaves, foliage branches, fruits, floral parts etc. According to Leopold (1967) abscission is a Senescence phenomenon. Senescence as an active development cellular process in growth and functioning of a flowering plant is indicted in leaf abscission.
Whole plant senescence also known as overall senescence occur in annulas (eg, rice, wheat, gramme, mustard) biennials (eg, henbane or perennials.)
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
Fruit and leaf drop at early stages can be prevented by the application of
Cytokinins
Ethylene
Auxins
Auxins
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
The Golgi complex participates in
Fatty acid breakdown
Formation of secretory vesicles
Activation of amino acid
Respiration in bacteria
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
Which one of the following pairs, is not correctly matched?
Abscisic acid - Stomatal closure
Gibberellic acid - Leaf fall
Cytokinin - Cell division
Cytokinin - Cell division
