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Questions
What is meant by pollination?
What is pollination?
Solution
The transfer of the pollen grains from the anthers to the stigma of a flower is called pollination.
RELATED QUESTIONS
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
What is the function of a flower?
Fill in the following blank with suitable word :
The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is...........
What is made in ovary of a flower?
How is the process of pollination different from fertilization?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Explain sexual reproduction in plants.
Pollen grains are formed by _________ division in locules of anthers.
Accessory whorls : Calyx and corolla : : essential whorls : ______________
Pollen tube reaches the embryo sac via style.
Give scientific reason.
Fertilization in plants is called double fertilization.
Observe the figure below. Write functions of the labelled parts.
How many middle layers are generally present in the wall of the anther lobes?
Length of pollen tube depends on the distance between ______
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
