Microcytes vs Megacytes Flashcards
Microspore mother cells
Microsporocytes
Microsporocytes in the ____ undergo meiotic division
anther
Microsporocytes
Microspore mother cells
A microspore is produced, nursed by ________
tapetum
The microspore undergoes mitotic division and produces ________
Two sperm nuclei and a pollen tube nucleus
The ____________ will continue the vegetative cell
pollen tube nucleus
The sperm nuclei will constitute the ________
generative cell
The ______ will elongate when the pollen reaches the _____
pollen nuclei, stigma.
What allows the sperm to enter the ovule
the elongation of the pollen nucleus until it reaches the stigma
Magaspores mother cells
megasporocytes
Megasporocytes in the ___ undergo meiotic division
ovule
How many nuclei are produced in the formation of megagametophytes
four nuclei, but only one remains to grow to a megaspores
Megaspores are nursed by the _______ or the parenchymal cells in the ovule
nucellus
The megaspores will undergo ___ mitotic divisions
three (3)
the megaspores will undergo three mitotic divisions to produce ________
eight nuclei
By the time that eight nuclei are formed the whole ovule is called _______
embryo sac
The eight nuclei becomes _________
seven cells
What are the seven cells that came from the eight nuclei
1 egg cell
2 synergids
1 binucleate polar cell
3 antipodal cells
The egg with two synergids is called the ________
egg apparatus
Has an intricate cell wall
Microgametophyte
Exine outer layer having sporopollenin
Microgametophytes
substance that prevents the pollen from drying up an dinner intine layer
Microgametophytes
Sporopollenin is a substance that prevents the pollen from drying up an ________
dinner intine layer
Microgametophyte - ________ having sporopollenins
exine layer
Venue for the whole fertilization process
Megagametophytes
VARIATION IN THE POLLEN GRAIN
Surface
Presence of pollen openings
Smooth
Scarbrate
Rough
Verrucose
Porous
Spinose
No Opening
APERTURATE
With an opening
Perturate
Two types of perturate
Monoperturate and Polyperturate
1 pore
Monoperturate
2 or more pores
Polyperturate