The Megaspore Mother Cell (MMC) differentiates in which region of the nucellus?
Ovules generally differentiate a single megaspore mother cell (MMC) in the micropylar region of the nucellus.
Question 112 of 501
📘 CLASS XII
What is the ploidy of the Megaspore Mother Cell (MMC)?
The MMC undergoes meiotic division... results in the production of four megaspores. (Implies MMC is diploid/sporophytic).
Question 113 of 501
📘 CLASS XII
In the formation of the embryo sac, the functional megaspore undergoes how many sequential mitotic divisions?
The nucleus of the functional megaspore divides mitotically to form two nuclei... Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate stages.
Question 114 of 501
📘 CLASS XII
The egg apparatus in an embryo sac consists of:
The egg apparatus, in turn, consists of two synergids and one egg cell.
Question 115 of 501
📘 CLASS XII
Which part of the pistil serves as a landing platform for pollen grains?
The stigma serves as a landing platform for pollen grains.
Question 116 of 501
📘 CLASS XII
Autogamy requires synchrony between:
Autogamy in such flowers requires synchrony in pollen release and stigma receptivity.
Question 117 of 501
📘 CLASS XII
Flowering plants use which biotic agent most dominantly for pollination?
Among the animals, insects, particularly bees are the dominant biotic pollinating agents.
Question 118 of 501
📘 CLASS XII
Pollination by water is limited to approximately how many genera?
Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly monocotyledons.
Question 119 of 501
📘 CLASS XII
In water hyacinth, the flowers emerge above the water level and are pollinated by:
In a majority of aquatic plants such as water hyacinth... the flowers emerge above the level of water and are pollinated by insects or wind.
Question 120 of 501
📘 CLASS XII
Which of the following is NOT a floral reward for pollinators?
Nectar and pollen grains are the usual floral rewards... foul odours (are used) to attract these animals (flies/beetles), not as a reward.
