Tag: growth and development in plants
Questions Related to growth and development in plants
Achalmydeous flower occurs in
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Sunflower
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Betel
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Onion
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Avena
Achlamydeous condition refers to the absence of both the calyx and the corolla. Instead, there is a presence of the whorl called perianth. This type of condition is seen in betel, belonging to the family Piperaceae.
Involucre is composed of
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Bracts
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Extra calyx
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Bracteoles
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Scale leaves
Involucre refers to the group of bracts that are arranged in one or more whorls around the flowers. Example, sunflower.
Read the statements carefully :
a) Flowers are morphological and embryological marvel and the site of sexual reproduction
b) The proximal end of the filament is attached to the thalamus or the petal of the flower
c) The number and length of stamens are variable in flowers of different species
d) stamen attached to the petal is epipetalous
How many above statements are correct
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One
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Two
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Three
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Four
Flowers are the site of sexual reproduction in a flowering plant. They are a morphological and embryological marvel. The proximal end of the filament of the stamen is attached to the thalamus or the petal of the flower. The number and length of stamens are variable in flowers of different species. The number varies from 3 to 10 in different species. Also, the size of stamens varies largely in different species. Stamen attached to the petal is called as epipetalous. For example, Brinjal.
Bougainvillea flower is an example of
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incomplete flower
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having a large nectary
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water pollination
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large colorful bracts
Bougainvillea flower of the plant is generally white and in which each cluster of 3 flowers is surrounded by 3 or 6 bracts with the bright colors associated with the plant, including purple, magenta, red, pink, white, or yellow, orange,
Perianth is bilabiate personate is
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Antirrhinum
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Salvia
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Peristrophe
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Ocimum
Climber plant with zygomoprhic flower and diadelphous stemen is
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Tomato
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Soybean
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Dracaena
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Mustard
Tomato belongs to Family Soianaceae. It is a climber. It has actinornorphic flower.
A flower with sepals, petals, stamens and carpels is said to be
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complete
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incomplete
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actinomorphic
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imperfect
A flower having sepals, petals, stamens, and pistils are complete; lacking one or more of such structures, it is said to be incomplete. Stamens and pistils are not present together in all flowers. Rose, hibiscus, Oxalis, are a few examples
Mature ovary forms the
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Seed
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Stamen
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Pistil
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Fruit
Fruits are formed by the maturation of one or more ovary. Fruits contain seeds resulting from the maturation of fertilized ovules. However, maturation of seed and fruit can occur in the absence of fertilization. In fleshy fruits, the outer covering is called as pericarp. Pericarp is again made of three layers, the epicarp, which is the outermost layer; the mesocarp, which is the middle layer; and the endocarp, which is the inner layer surrounding the ovary or the seeds.
Which of the following is a post fertilisation event in flowering plants?
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Transfer of pollen grains
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Embryo development
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Formation of flower
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Formation of pollen grains
In angiosperms, normally after fertilisation.
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The zygote divides earlier than the primary endosperm nucleus
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The primary endosperm nucleus divides earlier than the zygote
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Both the zygote and primary endosperm nuclei divide simultaneously
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Both the zygote and primary endosperm nuclei undergo a resting period
Endosperm is the nutritive tissue for the developing embryo and the seedlings. In angiosperm, the endosperm develops from triploid primary endosperm nucleus which is formed as a result of vegetative fertilization, triple fusion or fusion of male gamete with the secondary nucleus of the central cell. Generally, endosperm divides before zygote because it will provide nourishment to the developing zygote.