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Anatomy of Flowering Plants Test - 40

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Anatomy of Flowering Plants Test - 40
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  • Question 1
    1 / -0
    Periblem gives rise to
    Solution
    Periblem is a primary meristem that gives rise to the cortex and is located between plerome and dermatogen. It is also called as nascent cortex.
  • Question 2
    1 / -0
    Plant stem cells have the ability to
    Solution
    Stem cells are pluripotent and they have the ability to divide and differentiate. The meristematic tissue has immense potential to divide. The newly formed cells undergo differentiation  and get specialized to perform a specific function for example- vascular bundles. They have the capacity to self renew themselves whenever necessary. 
    Therefore, the correct answer is option D.
  • Question 3
    1 / -0
    Which of the following is not a function of ground tissue in plants?
    Solution
    Ground tissue system comprises of simple permanent tissues like parenchyma.collenchyma and sclerenchyma. 
    1. In leaves, the ground tissue consists of thin-walled chloroplast containing cells known as Palisade mesophyll cells. 
    2. Parenchyma cells help in photosynthesis, storage etc.
    3. Collenchyma and sclerenchyma are providing strength, anchorage, and support to plant. 
    4. As they lack meristems they do not form new tissues in general.
    So the correct option is 'Production of other tissues'
  • Question 4
    1 / -0
    The girth of the plant does not increase by
    I. Apical meristem
    II. Vascular cambium
    III. Cork cambium
    Solution
    The vascular cambium has thin walled highly vacuolated cells of two types, the fusiform initials and the ray initials. The fusiform initials are the elongated cells that give rise to secondary xylem and secondary phloem which in turn increase the girth of plants. The cork cambium exhibit meristematic activity and produces cork /phellem towards the periphery and phelloderm on inside i.e. extra stellar growth which in turn increase the girth of plants. Apical meristem is present at the tips of plants parts and serves in the increase in the length of plant parts/plant. Since it does not increase the girth of the plant, option A is the correct answer. 
  • Question 5
    1 / -0
    Interfasicular cambium is a
    Solution
    Interfascicular cambium is considered to be the secondary meristematic tissue that involves in the formation of cambium ring. It becomes active and also activates the cells present in between the vascular bundles and they start dividing and combined form interfascicular cambium and joins the strips to form cambium ring in the stellar region.
    So the correct option is "Secondary meristematic tissue".
  • Question 6
    1 / -0
    Identify the correct pair of statements from the following.
    (I) Pericycle of dicot root parenchymatous but sclerenchymatous in mature monocot root.
    (II) Pericycle cells of both dicot ancimonocot roots actively divide to produce lateral toots during secondary growth.
    (III) All cells of endodermis are passage cells in dicot.
    (IV) Xylem always produced in a centripetal manner in the roots of fruit bearing plants. 
    Solution
    In dicots, the endodermis is developmentally the innermost portion of the cortex and prevents water, and any solutes dissolved in the water, from passing through this layer via the apoplast pathway. However, the passage cells are endodermal cells of older roots.
    The pericycle is a cylinder of parenchyma or sclrenchyma cells which lie just inside the endodermis forming the outer most part of stele in all plants.
    Xylem which transports water and nutrients from the roots to the shoot and leaves. In the xylem, the protoxylem and metaxylem vessels exhibit characteristic orientation with reference to the central axis and based on this its differentiated as centripetal and centrifugal. The centripetal arrangement is found in roots of fruit bearing plants where the younger metaxylem vessels are found towards the pith while the older protoxylem vessels are found away from the pith.
  • Question 7
    1 / -0
    Which of the following is not a function of ground tissue?
    Solution
    The ground tissue is all plant tissues except vascular and dermal tissues. The parenchymatous ground tissue serves in photosynthesis, food storage and healing and tissue regeneration. Collenchymatous ground tissue supports the young stem, roots and petioles. The sclerenchymatous ground tissue provides rigid support and protection to plant parts. The function of material transport is performed by vascular tissue system which is not the part of the ground tissue. Thus, the correct answer is D.
  • Question 8
    1 / -0
    Which one of the following characters is not found in transverse section of monocot stem?
    Solution
    A transverse section passing through the monocot stem reveals:
    Epidermis, hypodermis (represented by a few layers of the compactly arranged sclerenchyma cells), ground tissue, vascular bundles (each vascular bundle has a covering, called as bundle sheath formed by a single layer of sclerenchyma cells), lysigenous cavity is present in the monocot stem.
    The only thing not present in the monocot stem is the starch sheath.
    Thus, the correct answer is option (D).
  • Question 9
    1 / -0
    The cellular organization between a single cell and an entire organism is controlled by:
    Solution
    A cellular organization between a single cell and a complete organism is controlled by the tissue. They are the collection of similar cells, with specific function. A collection of tissue gives rise to an organ. Proteins, enzymes and hormones do not take part in cellular organization.
    Hence, the correct option is 'B'.

  • Question 10
    1 / -0
    Collocytes which provide mechanical strength to the plants are present in
    Solution
    The living mechanical tissue is collenchymas. It is found in young stems, petioles, peduncles, pedicels, veins, veinlets and leaf margins. It is absent in root systems of all plants and stem and leaves of monocots. The cells present in collenchymas are called collocytes
    Thus, the correct answer is option A.
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