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1. Differentiate complete and incomplete flowers.
2. What are the essential parts of a flower? Why are they called so?
3. What is the importance of nectaries in a flower?
4. What is a neuter flower? Give an example.
5. Differentiate petaloid and sepaloid.
6. Answer the following with the most appropriate biological term:
a) Flower which contains both stamens and carpels.
b) The cup shaped structure on which the floral whorls are arranged.
c) The two parts of a stamen.
d) Flowers in which only stamens are present.
e) The term for undifferentiated sepal and petal.
f) An example for a unisexual flower.
Answers
Answer:
1.coplete flower has all 4 whorls while incomplete dont have
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction4.which neither bears androecium nor gynoecium
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction4.which neither bears androecium nor gynoecium ex.-ray florets of sunflower
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction4.which neither bears androecium nor gynoecium ex.-ray florets of sunflower 5.petaloid which is green in color
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction4.which neither bears androecium nor gynoecium ex.-ray florets of sunflower 5.petaloid which is green in colorand sepaloid which have brightly color
1.coplete flower has all 4 whorls while incomplete dont have2.androecium and gynoecium.cause they are directly concerned with sexual reproduction 3.it helps the plant in reproduction4.which neither bears androecium nor gynoecium ex.-ray florets of sunflower 5.petaloid which is green in colorand sepaloid which have brightly color6a.bisexual c.anther and filament d.staminate f. watermelon
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Answer:
1)complete flower is one that includes all four floral parts: sepals, petals, stamen(s) and pistil(s). An incomplete flower lacks one or more of those parts. Contrast with “perfect” flower, which refers only to stamens and pistils, individual flowers containing both; imperfect flowers are either male or female only.
2)Essential parts of a flower are those that are directly associated with reproduction. E.g. Stamen and Carpel
3)Nectar is a sugar-rich liquid produced by plants in glands called nectaries or nectarines, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists, which in turn provide antiherbivore protection.
4)flower is said to be neuter, when it is devoid of both male androecium and female gynoecium, as an example the Ray florets of sunflower.
5)When the calyx is green it is termed as sepaloid and when it is brightly colored it is called as petaloid. Also, when the tepals are undifferentiated they resemble petal therefore, they are called as petaloid. Hence, sepaloid means sepal like appearance and petaloid is petal like appearance.
6a)Hibiscus or Shoeflower is an example of a flower which contains both, stamen and carpel. A stamen refers to the male reproductive part of a flower whereas a carpel is its female counterpart. There are various flowers that contain both stamens and carpels. Such flowers are termed as bisexual flowers
b)Perigynous flower has concave or cup-shaped thalamus forming rims or flanges, on which stamens, petals and sepals other whorls are placed around it. The ovary is said to be inferior.
c)The male parts are called stamens and usually surround the pistil. The stamen is made up of two parts: the anther and filament. The anther produces pollen (male reproductive cells). The filament holds the anther up.
d)flower with only stamens is called as androecious. A flower with only carpels is called as gynoecious.
e)The flowers with undifferentiated petals and sepals are also called as thalophytes.
f)Unisexual flowers: Coconut flowers, Papaya, Watermelon, Cucumber, Maize, White mulberry, Musk melon,Castor bean, Marrow, Luffa, Snake gourd, Bitter gourd, Tapioca, Pumpkin, American holly, Birch, Pine, Gopher purge, Tungoil bean.
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