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Morphology of Flowering Plants Test 64

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Morphology of Flowering Plants Test 64
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  • Question 1
    1 / -0
    Ochreate stipules occur in the family
    Solution
    Ochreate stipules occur in the family Polygonaceae. The lateral appendages present at the leaf base are called as stipules. Stipules show wide range of structural diversity. Ochreate stipules form when the two stipule are fused to form a tube like structure. Main function of stipules is to protect the leaf in the bud. 
    Thus, the correct answer is option C.
  • Question 2
    1 / -0
    The edible part of turnip is
    Solution
    The edible part of turnip is a modified tap root. Tap roots are modified into various structures called as modified tap root. These modified structures does food storage. The type of modified tap roots are fusiform, napiform, conical, tuberous, pneumatophores. The edible part of turnip is fusiform tap root, where the primary root of the system is swollen at the middle and tapers gradually at both the ends forming a spindle shaped structure. 
    Thus, the correct answer is option B.
  • Question 3
    1 / -0
    Verticillaster inflorescence occurs in
    Solution
    Verticillaster inflorescence occurs in Labiatae. Verticillaster inflorescence is an inflorescence in which the flowers are arranged in a seeming whorl, consisting in fact of a pair of opposite axillary, usually sessile, cymes, as in many mints.  A verticillaster is a fascicle with the structure of a dichasium; it is common among the Lamiaceae. Many verticillasters with reduced bracts can form a spicate (spike-like) inflorescence that is commonly called as a spike.
  • Question 4
    1 / -0
    Cork of dicot stem comprises of
    Solution
    Cork cambium is a tissue found in many vascular plants as part of the periderm. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems. 
    Synonyms for cork cambium are phellogen. 
    Phellogen is defined as the meristematic cell layer responsible for the development of the periderm.
    The periderm thus consists of three different layers:
    1. phelloderm – inside of cork cambium; composed of living parenchyma cells
    2. phellogen (cork cambium) – meristem that gives rise to periderm
    3. phellem (cork) – dead at maturity; air-filled protective tissue on the outside.
  • Question 5
    1 / -0
    Chloroplasts are found in the root cells of 
    Solution
    Some of the aerial climbers such as Tinospora have got photosynthetic or assimilatory roots and the chloroplasts are found in their cortical cells. Roots that can carry out photosynthesis are called as photosynthetic roots. This is uncommon function for them but some plants have such roots. These are aerial roots (hanging in the air) and thus are exposed to light. They develop photosynthetic (green with chlorophyll or chloroplasts) tissue and thus carry out the function. Epiphytic orchids and Tinospora are good examples. 
    Thus, the correct answer is option C.
  • Question 6
    1 / -0
    Flowers are sessile in 
    Solution
    Flowers are sessile in spike. A spike is an unbranched, indeterminate inflorescence, similar to a raceme but bearing sessile flowers (sessile flowers are attached directly, without stalks). Examples occur on Malabar nut (Justicia adhatoda) and chaff flowers. 
    Therefore, the correct answer is option B.
  • Question 7
    1 / -0
    Which one of the following is of related type?
    Solution
    Corymb and umbel are related. Indeterminate simple inflorescences are generally called as racemose.
    • A racemose corymb is an unbranched, indeterminate inflorescence that is flat-topped or convex due to their outer pedicels which are progressively longer than inner ones.
    • An umbel is a type of raceme with a short axis and multiple floral pedicels of equal length that appear to arise from a common point.
      Therefore, the correct answer is option C.
  • Question 8
    1 / -0
    Zig-zag development of flower on inflorescence axis is
    Solution
    Zig-zag development of flower on inflorescence axis is Scorpioid cyme. Determinate simple inflorescences are generally called as cymose. The main kind of cymose inflorescence is the cyme. Secondary buds develop alternately on the stem in a scorpioid cyme.
    Therefore, the correct answer is option D.
  • Question 9
    1 / -0
    In plants, during embryonic condition
    Solution
    Embryonic tissue in plants refers to the actively growing cells but more than often this term is used to describe the early formation of tissue during its first growth stages. It thus refers to the sporophyte, gametophyte embryos from seedlings as well as meristematic tissues which are always in embryonic state. Under this condition, the growth of this tissues takes place through cell division and the cells of the embryo divide.
    Therefore, the correct answer is option A.
  • Question 10
    1 / -0
    A biparous cyme ending in uniparous cyme constitutes
    Solution
    A biparous cyme ending in uniparous cyme constitutes the verticillaster. Verticillaster inflorescence is an inflorescence in which the flowers are arranged in a seeming whorl, consisting in fact of a pair of opposite axillary, usually sessile, cymes, as in many mints. A verticillaster is a fascicle with the structure of a dichasium; it is common among the Lamiaceae. Many verticillasters with reduced bracts can form a spicate (spike-like) inflorescence that is commonly called as a spike.
    Therefore, the correct answer is option A.
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