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Sexual Reproduction in Flowering Plants Test - 66

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Sexual Reproduction in Flowering Plants Test - 66
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  • Question 1
    1 / -0
    Some seeds are dispersed by animals ,especially spiny seeds with hooks which get attached to the bodies of animals and are carried to  distant places. Examples is/are -
    Solution
    The seeds of the fruits get dispersed by different methods. Xanthium and Urena are the plants in which the fruits produces seeds having structures like spines or hooks. These structures are used for clinging the seeds on the body of the animals and get carried away with them and get dispersed.
    Thus, the correct answer is option A. 
  • Question 2
    1 / -0
    The seeds of poppy are dispersed by 
    Solution
    The seeds and the fruits which can be dispersed by the help of wind have structures which allow them to float in the air. This method is known as anemochory. Generally, these seeds have wing, feathers or pappus-like structures which make them lighter and they ca be carried away with the wind. The seeds of poppy are dispersed by wind from the top opening of the fruit. 
    Thus, the correct answer is option C. 
  • Question 3
    1 / -0
    Seeds and fruits dispersed by wind have -
    Solution
    The seeds and the fruits which can be dispersed by the help of wind have structures which allow them to float in the air. Generally, these seeds have wing, feathers or pappus-like structures which make them lighter and they ca be carried away with the wind. 
    Thus, the correct answer is option A. 
  • Question 4
    1 / -0
    Male part of a flower is known as 
    Solution
    The male part or androecium is the whorl of the flower which produces male gametes. The stamen is the androecium which is composed of anther and filament. The anther contains pollen sacs which produce pollen grains which are male gametophyte containing the male gametes. 
  • Question 5
    1 / -0
    Male gametes are present in 
    Solution
    The pollen grain is the male gametophyte which contains the male gametes. The pollen grain is surrounded by two layers as exine which forms the outer layer and intine which forms the inner layer. The generative cell divides to form the two male gametes. Style and stigma are the parts of the female reproductive whorls. Filament is the long thread-like structure attached to the connective of the lobes of anther. 
  • Question 6
    1 / -0
    Which of the following is the male reproductive organ in plants? 
    Solution
    The androecium is the male reproductive whorl of the flower which produces male gametes. The stamen is the androecium composed of anther and filament. The anther contains pollen sacs which produce pollen grains which are male gametophyte containing the male gametes. 
  • Question 7
    1 / -0
    The seeds are scattered far from the parent plant in
    Solution
    • Balsam fruit is composed of pod-like structures. The castor fruit is spherical in shape. 
    • On maturity, these fruits dry out and open up. The breaking of the fruits causes an explosion which results in the seeds scattering and disperse. 
    • Cotton seeds have hairs over the seeds which help them to be carried away by the wind.

    Thus, the correct answer is option D. 
  • Question 8
    1 / -0
    Which of these is a bisexual flower?
    Solution
    A bisexual flower is a flower that contains all the four whorls such as petals, sepals, the male reproductive structure (stamen) and female reproductive structure (pistil/ carpel). Hence it is also called as a complete or perfect flower. Petunia is a bisexual flower. Thus the correct answer is option A.
  • Question 9
    1 / -0
    Pollen sacs are present in
    Solution
    The stamen is the androecium part of the flower which is composed of anther and filament. The anther contains pollen sacs which produce pollen grains which are male gametophyte containing the male gametes. There are four pollen sacs in the bilobed anther. 
  • Question 10
    1 / -0
    Seeds and friuts of plants are carried away by -
    Solution
    The seeds and fruits get dispersed by different methods. The seeds with wing-like structures can be dispersed by air. The water is the means of dispersal for the seeds or fruits with the fibrous or spongy coat. The seeds get attached to the body of the animals and are dispersed wherever carried by the animals.
    Thus, the correct answer is option D. 
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