Imagine a plant species where the pollen tube enters the embryo sac through the chalaza instead of the micropyle (chalazogamy). Which of the following would be the LEAST affected by this unusual entry pathway?
The path of pollen tube growth within the style.
The interaction between the pollen tube and the synergids.
The genetic makeup of the sperm cells.
The timing of pollen tube discharge into the embryo sac.
Related Questions
Emasculation is not required when flowers are?
bisexual
intersexual
unisexual
either 1 (or) 2
In orthotropous ovule, the micropyle and chalaza are
Oblique to funiculus
Parallel to funculus
At right angle to funiculus
In straight line with funiculus
During microsporogenesis, meiosis occurs in?
endothecium
microspore mother cell
microspore tetrad
pollen grains
Orthotropous ovule belongs to
Urtica
Polygonum
Peperomea
All of these
Pollen grains are shed at
1-celled stage
2- celled stage
2,3- celled stage
5- celled stage
During the formation of embryo sac, the functional megaspore undergoes
Two mitotic divisions
Two meiotic divisions
Three meiotic divisions
Three mitotic divisions
An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called
Pseudoparthenocarpy
Mimicry
Pseudopollination
Pseudocopulation
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
Larger nucleus in a pollen grain is
Generative nucleus
Vegetative nucleus
Tube cell
Sperm nucleus
Cleistogamy ensures seed set formation. This is an advantage but still there are disadvantages too. One of the disadvantage is
It brings genetic variations
Pollinators are not required
Genetic variations are limited in progeny
Flowers remain fragrant throughout the life
