Which one of the following is resistant to enzyme action?
Cork
Wood fibre
Pollen exine
Leaf cuticle
Related Questions
The typical structure of a mature angiosperm embryo sac does NOT include which of the following?
8 cells, 7 nuclei
7 cells, 8 nuclei
3 antipodal cells
2 synergids
Pollen grains can cause
Bronchial afflications
Asthma
Bronchitis
All of these
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is?
hemitropous
campylatropous
anatropous
amphitropous
A mutation affects the tapetum in a developing anther, leading to premature degeneration of this tissue. What is the MOST likely direct consequence of this mutation?
Increased production of viable pollen grains.
Enhanced pollen germination rates.
Defective pollen wall formation and reduced pollen viability.
Accelerated development of the microspore mother cells.
Chances of pollination in air and water are increased by increasing number of pollens. This statement is
TRUE
FALSE
Sometimes (a) and sometimes (b)
Neither (a) nor (b)
Which of the following plant structures exemplifies two generations embedded within each other?
Pollen grains inside the anther
Germinated pollen grain with two male gametes
Seed inside the fruit
Embryo sac inside the ovule
Filiform apparatus are
Special cellular thickning at antipodal cell
Special cellular thickning at micropylar end
Special cellular thickning at synergid cells
Special cellular thickning at nuclear end
Microsporogenesis is
Formation of microspores
Formation of female gametes
Formation of tapetum
All of the above
Embryo sac is also known as
Micro-gametophyte
Mega-gametophyte
Micro-sporangium
Mega - sporangium
The transfer of pollen from the anthers of one plant to the stigma of a different plant, introducing genetically distinct pollen, is known as:
Xenogamy
Geitonogamy
Autogamy
Cleistogamy
