Self Studies
Self Studies
Self Studies
Self Studies

Anatomy of Flowering Plants Test - 32

Result Self Studies

Anatomy of Flowering Plants Test - 32
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    An open collateral bundle is one in which
    Solution
    Collateral vascular bundles  have xylem and phloem are arranged side by side on same radius. If cambium is present in between xylem and phloem it is called as open collateral bundles, which are present in dicot stem. Thus, option A is correct. 
  • Question 2
    1 / -0
    The lateral branches of roots (dicot) generally originates from
    Solution
    The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants. Although, it is composed of non-vascular parenchyma cells, it is still considered part of the vascular cylinder, because it arises from the procambium as do the vascular tissues it surrounds. In eudicots, it also has the capacity to produce lateral roots. Branch roots arise from this primary meristem tissue. In plants undergoing secondary growth, the pericycle contributes to the vascular cambium often diverging into a cork cambium. 
  • Question 3
    1 / -0
    A bundle with xylem and phloem separated by a strip of cambium is
    Solution
    A vascular bundle in which the phloem and xylem lie on the same radius, with the phloem located toward the periphery of the stem and the xylem toward the centre is called as collateral. On the basis of presence or absence of cambium, collateral bundles are grouped as open or close bundles. Those with cambium are termed as open vascular bundles, while the vascular bundles without cambium are termed as closed. 
    So, the correct answer is option B.
  • Question 4
    1 / -0
    Grafting is not possible in monocots because they
    Solution
    Monocot plants cannot be grafted as they lack the cambium tissue which is present in dicot plants. Cambium tissue is a meristematic tissue which is present in the vascular bundles of the dicot plants. This tissue has a regeneration capacity due to which it can form new tissue at the time of grafting. The lack of cambium in monocots makes it impossible to graft. It only works with dicots and gymnosperms and not with monocots. So, grafting is not possible in monocots because they lack cambium and not because scattered vascular bundles, parallel venation and herbaceous.
    Thus, correct answer is option A.
  • Question 5
    1 / -0
    The best method of determining the age of tree is to
    Solution
    Dendrochronology or tree-ring dating, is the scientific method of dating based on the analysis of patterns of tree rings, also known as growth rings. Dendrochronology can date the time at which tree rings were formed, in many types of wood, to the exact calendar year. Growth rings, also referred to as tree rings or annual rings, can be seen in a horizontal cross section cut through the trunk of a tree. Growth rings are the result of new growth in the vascular cambium, a layer of cells near the bark that is classified as a lateral meristem. This growth in diameter is known as secondary growth.
  • Question 6
    1 / -0
    In dicot root showing secondary growth, cork is found
    Solution
    During secondary growth, rupturing of epidermal cell and outer cortex by secondary tissues induces formation of new protective layer, periderm turning the single layered pericycle into multi layered meristem that divides to form cork cambium or phellogen. The cork cambium exhibit meristematic activity and produces cork or phellem towards the periphery and phelloderm on inside, i.e., extrastellar growth. Moving from centre to periphery, a dicot root has pith, secondary xylem, secondary phloem, phelloderm (secondary cortex), phellogen (cork cambium), cork (phellem) and bark. Since, primary cortex is ruptured and is not present in secondary root. Cork is extra stellar tissues which is present outside the stele (vascular bundle, pith and medullary rays surrounded by pericycle) region and hence, cannot be present inner to endodermis.
    Thus, the correct answer is option B.
  • Question 7
    1 / -0
    In a dicotyledonous stem, the sequence of tissues from the outside to the inside is
    Solution
    Phellem is outermost layer of cork cambium, which is suberised. Hence, this is the first layer to be found. 
    Endodermis is one the layer of cortex, which is to be found under the phellem.
    Pericycle is the layer present between endodermis and vascular bundles. 
    Dicotyledonous stem possess conjoint, collateral vascular bundle, where xylem is internal and phloem is external. Therefore, phloem is to be encountered after the pericycle. 
  • Question 8
    1 / -0
    'Duramen' is
    Solution
    Heartwood is also called as duramen. It is dead, central wood of trees. Its cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic. Heartwood is mechanically strong, resistant to decay, and less easily penetrated by wood-preservative chemicals than other types of wood. One or more layers of living and functional sapwood cells are periodically converted to heartwood. 
  • Question 9
    1 / -0
    Atactostele is found in
    Solution
    Atactostele is a type of eustele, found in monocots, in which the vascular tissue in the stem exists as scattered bundles. Most seed plant stems possess a vascular arrangement, which has been interpreted as a derived siphonostele and is called as eustele. There is also a variant on the eustele found in monocots, like maize and rye. The variation has numerous scattered bundles in the stem and is called as an atactostele.
  • Question 10
    1 / -0
    Pith and cortex belongs to
    Solution
    Epidermis is the part of epidermal tissue system and forms the outer protective covering of primary plant body. 
    All tissues of a plant body except epidermal and vascular tissues system makes ground tissue, which can be intrastelar and extrastelar tissue, depending on its position with respect to stele. 
    Cortex and endodermis constitute extra stelar ground tissue, while pericycle, pith and medullary ray constitute the intra stelar ground tissue. 
    Vascular tissues system comprise of xylem, phloem and cambium. Thus, the correct answer is option B.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now