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Sexual Reproduction in Flowering Plants Test - 8

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Sexual Reproduction in Flowering Plants Test - 8
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  • Question 1
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Study the given diagram and answer any of the four questions given below:

    The junction of attachment of funicle with the body of ovule at B is

    Solution

    A scar on a seed (as a bean) marking the point of attachment of the ovule is called hilum. There is small pore, called micropyle, which represent the micropyle of ovule.

  • Question 2
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.

    Flowers with both androecium and gynoecium are called :

    Solution

    Androecium is the male part and gynoecium is the female part, and in those flower have both of these they are called bisexual flower.

  • Question 3
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.

    The prominent pollen grain aperture called germ pore is present in:

    Solution

    The prominent pollen grain aperture called germ pore is present in exine, it is decay-resistant outer coating of a pollen grain or spore.

  • Question 4
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.

    In which of the following plants the number of ovules in an ovary is one ?

    Solution

    Mango possess a single ovule in each ovary and orchids, watermelon, and papaya have multiple ovules present in each ovary.

  • Question 5
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.

    Direction : In the following questions a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

    Assertion (A) : The innermost layer of microsporangium is called tapetum.

    Reason (R) : Tapetum nourishes the develop into pollen grains.

    Solution

    Cells of tapetum have dense cytoplasm and more than one nuclei, which help in nourishing the developing pollen grains.

  • Question 6
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Study the given diagram and answer any of the four questions given below:

    A is the stalk of the ovule is called

    Solution

    Funicle is the stalk that attaches an ovule to the placenta in the ovary of a flowering plant. It contains a strand of conducting tissue leading from the placenta into the chalaza.

  • Question 7
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.

    A multicarpellary, syncarpous gynoecium is found in :

    Solution

    Papaver, brinjal, and tomato all have multicarpellary, syncarpous gynoecium. In this condition carpels are more than one and fused.

  • Question 8
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.

    Select the odd one out with respect to wall layers of microsporangium in flowering plants.

    Solution

    The integuments are the outer layer(s) of the ovule and develop into a seed coat as the ovule matures following fertilization.

  • Question 9
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Study the given diagram and answer any of the four questions given below:

    Tegmen develops from the part labelled C in the figure is called

    Solution

    The seed has two layers one is outer called the testa which is develops from the outer integument and another is inner layer called the tegmen which is develops from the inner integument of the ovule.

  • Question 10
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.

    Which among the following cell is binucleate in an embryo sac ?

    Solution

    Central cell form binucleate endosperm mother cell upon fertilization with one of the two sperm cells, forms triploid endosperm to nourish embryo development.

  • Question 11
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.

    Which among the following is a major cause of pollen allergy in India?

    Solution

    Parthenium is a invasive species in India, and its is also known as carrot grass or congress grass which is the major cause of allergy in India, the parthenium weed produces as much as 3,000 million pollen grains per square meter during the flowering season.

  • Question 12
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Study the given diagram and answer any of the four questions given below:

    This diagram represent which type of ovule

    Solution

    Anatropous ovule is a completely inverted ovule turned back 180 degrees on its stalk. Ovule - a small body that contains the female germ cell of a plant; develops into a seed after fertilization.

  • Question 13
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.

    82% of ovules found in angiosperms are ............. .

    Solution

    Anatropous ovule is found in 82% angiosperm and it completely inverted ovule turned back 180 degrees on its stalk.

  • Question 14
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    Study the given diagram and answer any of the four questions given below:

    In the following questions a statement of Assertion (A) is followed by a statement of

    Reason (R). Mark the correct choice as:

    Assertion (A) : Most common type of ovule is anatrous.

    Reason (R) : Anatropous ovule is horse-shoe shaped.

    Solution

    Funiculus lies at the micropylar end and due to the unilateral growth of the ovule is called anatropous ovule. In angiosperms, when the curvature of the ovule affects the nucellus and later it becomes horse shoe-shaped. Such ovule is called amphitropous.

  • Question 15
    4 / -1

    Read the following text and answer the following questions on the basis of the same:

    A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.

    Study of pollen grains is called ............

    Solution

    Study of pollen grains is called polynology.

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