Which of the following is the reason for inbreeding depression?
Continued self-pollination is the reason for inbreeding depression. Inbreedingdepression means reduced biological fitness of the given population.
This is the innermost wall layer of the microsporangium.
Tapetum is the innermost wall layer of the microsporangium.
How does the seed coat get oxygen and water?
Micropyle is a small pore in the seed coat which facilitates the passage of oxygen and water in the seed coat.
Where does the proximal end of the long and slender stalk attach?
The proximal end of the long and slender stalk attaches to the Thalamus.
In which of the following thalamus is also used in the fruits formation?
Apple is an example of false fruit. In apple, major part of fruit is formed by thalamus not from ovary.
Which of the following organic material is present in the hard outer layer of the pollen grain?
The hard outer layer of the pollen grain is made up with the organic material called sporopollenin.
Which of the plant’s flower is the safe place for the pollinators to lay eggs?
Flowers of Amorphophallus are 6 feet in height. It provides a safe place to lay eggs.
Which of the following stage is similar in both monocotyledons and dicotyledons?
Though the seed of monocotyledons and dicotyledons differ, the early embryo development is similar.
Which of the following is used to store the pollen grains for many years?
The pollen grains can be stored for many years with the help of liquid nitrogen.
Perisperm is persistent nucellus in seed.
Which of the following fruits are developed without fertilization?
Banana is developed without fertilization. Fruits developed without fertilization are called parthenocarpic fruits.
In albuminous seed, the food is stored in
In albuminous seed, the food is stored in endosperm.
Describe the nature of the mass of cells enclosed within the integuments.
The mass of cells enclosed within the integments have sufficient reserve food materials.
Identify the features of the insect-pollinated flowers.
The insect-pollinated flowers are large, colorful, having fragrance, and rich in nectar.
Which of the following is a correct pair?
Primary endosperm cell – Endosperm. After triple fusion the central cell becomes the primary endosperm cell (PEC) and develops into the endosperm.
Pollination occurs in
Pollen grains are found only in gymnosperms and angiosperms.
In which of the following plants is the endosperm completely consumed by the embryo before the maturation of the seed?
In pea and groundnut the endosperm is completely consumed by the embryo before the maturation of the seed.
The main embryo developed from the structure formed as a result of
The main embryo developed from the structure formed as a result of syngamy.
The cell that divides to form two male nuclei in angiosperms is
Generative cell divides into two male gametes, if it has not divided already.
Pollination by water is seen in
Vallisneria is a submerged, dioecious, fresh water plant hence pollinated in water.
Which of the following is true?
Xenogamy involves the transfer of pollen grains from the flower of one plant to the stigma of the flower of another plant of the same type, which is a type of cross pollination. Geitonogamy involves the transfer of the pollen from the anther of one flower to the stigma of another flower on the same plant. Syngamy is the fusion of gametes. Autogamy involves the transfer of the pollen from the anther of a flower to the stigma of the same flower.
Wheat, paddy and mango. What is common among these?
They all have single ovule in an ovary.
Which of the following plant doesn’t need emasculation?
The plant that produces uni-sexual flowers doesn’t need emasculation.
Through which route the pollen tube enters the ovule?
All three types can be route of the pollen tube enters in the ovule as chalazogamy, mesogamy and porogamy.
How does cotyledon help the seeds?
Cotyledons help the seeds by providing nutrients.
The polyembryony commonly occurs in
Polyembryony refers to the formation of more than one embryo within a seed of a flowering plant e.g., Citrus.
Which of the following is a very rare water pollinating plant?
Water pollination takes place in all the given plants (Vallisneria, Hydrilla, and Zostera).
The odd one is
Pollen grains are not part of ovule.
Which of the following is not the part of post-fertilization event?
Formation of triploid endosperm nucleus is not the post-fertilization event.
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