Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Plant Growth and Development Test - 18

Result Self Studies

Plant Growth and Development Test - 18
  • 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
    Synthetic auxins are used for 
    Solution
    2,4-D is the synthetic auxin responsible for the weedicide activity. It helps in killing the unwanted plants which grow along with the crop plant and thus reduce the yield. Presence of 2,4-D prevents this situation.
  • Question 2
    1 / -0
    2, 4-D is a ..............
    Solution
    2,4-D is  a synthetic auxin. It is found to have very good weed killing ability. Weedicide is the substance which can kill the unwanted plant growing along with the crop, which results in the reduction of yield of the crop. It is highly toxic to broad - leaved plants. Its carbohydrate mechanism can even burn the dicots.
  • Question 3
    1 / -0
    Auxins originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely ..............
    Solution
    Auxin is a prominent plant hormone which has several functions in plants. It is usually present at the growing tips like shoot or root tips. They are transported primarily toward the roots. It moves from apex to base, polar transport. Thus it is called as basipetal movement.
  • Question 4
    1 / -0
    Bioassay for auxin is .............................
    Solution
    The Avena geo-curvature test is a bioassay for auxin-type growth regulators. Etiolated oat coleoptiles are used and the test is conducted in special perspex trays.

  • Question 5
    1 / -0
    Substances which originate at the tip of the stem and control growth 
    elsewhere are ................
    Solution
    Hormones are the substances which are secreted by cells in one part of the plant. Whereas the action of that substance and the effect of the same will be in some other part of the plant and are produced in a very small amount.
  • Question 6
    1 / -0
    Differentiation of shoot is controlled by 
    Solution
    Plants like all multicelluar organisms, are derived from single celled zygotes after mitotic divisions and differentiation of cells. While the development of the shoot and root are led by the activities of the apical meristems at the respective zones, tissue culture techniques are used for shoot differentiation. Thus in a  culture medium studies  show that root-shoot differentiation is a function related to ratio of auxins and cytokinins in the induction medium. A high auxin to cytokinin ratios favours shoot differentation
  • Question 7
    1 / -0
    Abscission of fruits is prevented by 
    Solution
    IBA is a synthetic auxin used by horticulturists for the prevention of abscission of fruits. Shedding of ripe fruits from the stem is called abscission. Generally, a layer of tissue is formed at the base of the organ. This layer of tissue is called abscission zone. The abscission zone does not form when the concentration of auxin is high.  
    So, the correct answer is 'IBA'.
  • Question 8
    1 / -0
    Which of the following is an auxin?
    Solution
    Indole-3-acetic acid is the most common naturally occurring plant hormone of the auxin class. It is the best known of the auxins and has been the subject of extensive studies by plant physiologists. IAA is predominantly produced in cells of the apex and very young leaves of a plant.
  • Question 9
    1 / -0
    In plants, auxin synthesis occurs in .....................
    Solution
    Auxin is the plant hormone which is present in the meristematic tissues. It is thus usually found at the tips of shoots and roots. It is also explained to be present at the growing tips.
  • Question 10
    1 / -0
    Phototropic curvature is the result of uneven distribution of ...................
    Solution
    Auxin is a plant hormone which has several functions in plant life. It is responsible for cell elongation, cell multiplication, apical dominance and even phototactic movement. Thus the uneven distribution of auxin hormone can cause phototropic curvature. It was confirmed by the bioassay of Avena coleoptile curvature test.

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