Tag: division for growth and reproduction
Questions Related to division for growth and reproduction
The pollen tube discharges its contents in ______________.
During the process of fertilisation the pollen tube of the pollen grains usually enters the embryo sac through.
Refer to the given figure of egg apparatus showing entry of pollen tube into a synergid. Identify any two of the labelled parts and select the correct option.
Select the correct option regarding the ploidy level of different structures of an angiospermous ovule.
Study the following statements and select the correct option.
(i) Tapetum nourishes the developing pollen grains.
(ii) Hilum represents the junction between ovule and funicle.
(iii) In aquatic plants such as water hyacinth and water lily, pollination is by water.
(iv) The primary endosperm nucleus is triploid.
To produce $500$ pollen grains, how many microspore mother cells are required?
A callose covering is present over
In tenuinucellate ovules, the nucellus may break down. The nourishment is then provided by
Which of the following stage of M-phase is considered as tetraploid stage?
A cell divides in order to?