How many cells and nuclei are present in a mature embryo sac of a typical angiosperm?
8 cells, 7 nuclei
7 cells, 7 nuclei
8 cells, 8 nuclei
7 cells, 8 nuclei
Related Questions
A flower exhibiting cleistogamy, but with viable pollen grains, fails to produce seeds. Which of the following is the LEAST likely explanation for this observation?
Lack of pollinating agents
Failure of pollen tube growth
Non-functional stigma
Problems with fertilization
Intine is made up of
Cellulose
Pectin
Both (a) and (b)
Protein
Which of the following is incorrect in angiosperm?
Double fertilization
Presence of vessels in xylem
Ovules enclosed in ovary
Free-living gametophyte
Which of the following is NOT a part of the angiosperm ovule?
Integuments
Micropyle
Nucellus
Anther
Pollens outer layer is called …A… . This is made up of …B… . This is absent on the …C… . Fill in the blanks A, B and C
A-Intine, B-organic compound, C-micropyle
A-exine, B-sporopollenin, C-germ pore
A-exine, B-intine, C-micropyle
A-micropyle, B-intine, C-exine
Embryo sac of angiosperms
Has 3 synergids and 2 anitpodal cells
Has three celled egg apparatus
Is 8 celled and 7 nucleate structure
Has three antipodal cells at micropylar end
Pollination by insect is
Entomophily
Chiropterophily
Anemophily
Zoophily
Embryo sac represents
megaspore
female gametophyte
megasporophyll
megagamete
Which pollination mechanisms are inherently prevented in a species with distinct male and female plants?
Autogamy and xenogamy
Geitonogamy and xenogamy
Autogamy and geitonogamy
Cleistogamy and chasmogamy
Ovule of Opuntia is called and turn at more than angle is called
circinotropous
anatropous
hemitropous
amphitropous
