State whether the following statement is true or false.
Many male gametes are formed inside the pollen grains
A) True
B) False
Answer
665.4k+ views
Hint: In flowering plants two male gametes unite to produce the embryo and endosperm, respectively, with two female gametes, the egg and central cells.
Complete answer:
To solve this question, at first we should know the reproduction in plants. All plants have the means and structures appropriate for sexual reproduction. A flower’s basic function is to make seeds by sexual reproduction. The male and female reproductive structures distinguish and grow in the flowers, androecium and gynoecium. The androecium comprises a whorl of stamens indicating the reproductive organ of males and the gynoecium indicates the reproductive organ of females.
Now, lets us find the solution from the given options-
The germ cell divides for the production of two sperm cells by mitosis. When the pollen tubes germinate in the stigma of the female reproductive part of the flower. The pollen tube develops into the ovary through stigma. The pollen-grain germ nucleus divides and releases two sperm cells that pass down the pollen-tube. Thus, the given statement is true.
Pollen grains are formed by meiosis of microspore mother cells which are situated along the microsporangia's inner edge. Pollen comprises two cell pollen which constitute the male gametophyte. Thus, the option B cannot be the correct answer. Thus, the given statement is false.
Therefore, the right option is option A.
Note: One male sperm fuses with the egg, producing the zygote that will develop later into a sporophyte. The second sperm combines with the two polar bodies at the centre of the sac, producing the nutritious triploid endosperm tissue which will give energy for the growth and development of the embryo.
Complete answer:
To solve this question, at first we should know the reproduction in plants. All plants have the means and structures appropriate for sexual reproduction. A flower’s basic function is to make seeds by sexual reproduction. The male and female reproductive structures distinguish and grow in the flowers, androecium and gynoecium. The androecium comprises a whorl of stamens indicating the reproductive organ of males and the gynoecium indicates the reproductive organ of females.
Now, lets us find the solution from the given options-
The germ cell divides for the production of two sperm cells by mitosis. When the pollen tubes germinate in the stigma of the female reproductive part of the flower. The pollen tube develops into the ovary through stigma. The pollen-grain germ nucleus divides and releases two sperm cells that pass down the pollen-tube. Thus, the given statement is true.
Pollen grains are formed by meiosis of microspore mother cells which are situated along the microsporangia's inner edge. Pollen comprises two cell pollen which constitute the male gametophyte. Thus, the option B cannot be the correct answer. Thus, the given statement is false.
Therefore, the right option is option A.
Note: One male sperm fuses with the egg, producing the zygote that will develop later into a sporophyte. The second sperm combines with the two polar bodies at the centre of the sac, producing the nutritious triploid endosperm tissue which will give energy for the growth and development of the embryo.
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