Multiple Choice QuestionsOne of the commonly used plant growth hormone in tea plantations is
ethylene
abscisic acid
Zeatin
Zeatin
Stroma in the chloroplasts of higher plants contains
light -independent reaction enzymes
Light -dependent reaction enzymes
ribosomes
ribosomes
In which one of the following, the male and female gametophytes don't have free -living independent existence ?
Pteris
Funaria
Polytrichum
Polytrichum
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
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.
In leaves of C4 -plants malic acid synthesis during CO2 -fixation occurs in
epidermal cells
mesophyll cells
bundle sheath
bundle sheath
In germinating seeds fatty acids are degraded exclusively in the
proplastid
glyoxisomes
peroxisomes
peroxisomes
The wavelength of light absorbed by Pr form of phytochrome is
640 nm
680 nm
720 nm
720 nm
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