Mature male gametophyte is derived from a ‘pollen mother cell’ by
Three meiotic divisions
One meiotic, one mitotic division
Single mitotic division
Two mitotic divisions
Related Questions
Hydrophyte which does not show hydrophily is?
water hyacinth
Vallisneria
Zostera
Hydrilla
Transfer of pollen grains from one flower to another flower of same plant is
Geitonogamy
Autogamy
Allogamy
Cleistogamy
Which of the following is pollinated by water?
Seagrass
Sunflower
Rose
Cactus
After meiosis, one of the four megaspores survives and is called the functional megaspore. This functional megaspore develops into which of the following?
Ovule
Integuments
Nucellus
Embryo sac
Which of the following temperatures is ideal for cryopreserving biological materials like pollen grains?
-196°C
-20°C
4°C
25°C
Why is liquid nitrogen used for storing pollen grains for extended periods?
Its low temperature halts biological activity.
It provides nutrients to the pollen.
It simulates natural conditions.
It increases the rate of cell division.
What is the ratio of equational divisions that take place in Cycas and angiosperms respectively leading to the formation to male gametes from pollen grains?
1:1
2:1
3:2
1:2
The point of attachment of the ovule to the funicle is known as the:
Hilum
Micropyle
Chalaza
Integument
The flowers of Vallisneria are:
Colorful and produce nectar
Large and fragrant
Small and inconspicuous
Brightly colored and scented
