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The Flower

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Question
ICSEENIBI9010374
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  1. Bougainvilleaflower is an example of

    2. (a) incomplete flower

    (b) having a large nectary

    (c) water pollination

    (d) large colourful bracts

    1. A flower is said to be complete when:

    (a) It has the corolla and calyx

    (b) It has the corolla and gynoecium

    (c) It has the androecium and gynoecium

    (d) It has all the four whorls

    1. The part of the flower that gives rise to the fruit is

    (a) Sepals

    (b) Petals

    (c) Ovary

    (d) Stamens

    1. The part of the flower that gives rise to the seed is

    (a) Ovary

    (b) Placenta

    (c) Ovule

    (d) Pollen grain

    1. The essential whorls of a flower are the

    (a) Calyx and corolla

    (b) Stamen and ovary

    (c) Calyx and epicalyx

    (d) Androecium and gynoecium

Solution

  1. (d) large colourful bracts
  2. (d) It has all the four whorls.
  3. (c) Ovary
  4. (c) Ovule
  5. (d) Androecium and gynoecium

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Question
ICSEENIBI9010375
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Match the parts in Column A with the flowers or parts of flower in Column B.

Column A 

Column B 

(a) Polyadelphous

(i) Polypetalous

(b) Pollen grains

(ii) Calyx, corolla

(c) Free petals

(iii) Nectar

(d) Non-essential

(iv) Bombax

(e) Sweet fragrant fluid

(v) Pollen sac

 

Solution

 

Column A 

Column B 

(a) Polyadelphous

(i) Bombax

(b) Pollen grains

(ii) Pollen sac

(c) Free petals

(iii) Polypetalous

(d) Non-essential

(iv) Calyx, corolla

(e) Sweet fragrant fluid

(v) Nectar

Question
ICSEENIBI9010376
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Explain the following terms:

(a) Incomplete flower

(b) Staminate flower

(c) Pistillate flower

(d) Bisexual flower

Solution

(a) Incomplete flower - If one or more sets of floral structures are missing, the flower is called incomplete flower. E.g. American elm. 

(b) Staminate flower - A unisexual flower which contains only the stamens, i.e., male parts of a flower is called male or staminate flower. E.g. Eastern cottonwood. 

(c) Pistillate flower - A flower which contains only the carpels, i.e., female parts of a flower is called female or pistillate flower. E.g. Date palm.

(d) Bisexual flower - A flower which contains both stamens and carpels is called bisexual or hermaphrodite flower. E.g. Hibiscus.

Question
ICSEENIBI9010377
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Distinguish between the following pairs:

(a) Flower and inflorescence

(b) Petals and petaloid sepals

(c) Polyandrous and polyadelphous androecium

Solution

(a) Flower and Inflorescence

 

Flower

Inflorescence

Flower is a specialized shoot in which the leaves are modified into floral structures.

Inflorescence is the mode of arrangement of flowers on the axis of the plant.

 

(b) Petals and Petaloid sepals

 

Petals

Petaloid sepals

Petals are non-essential parts of a flower which help in protection of reproductive parts and make the flower attractive for pollination.

Undifferentiated petals and sepals together form the perianth. When perianth is non-green, it is called a petaloid.

 

(c) Polyandrous and polyadelphous androecium

Polyandrous androecium

Polyadelphous androecium

In polyandrous androecium, filaments of the stamens are free.

In polyadelphous androecium, filaments of the stamens are united in several groups.

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