Self Studies
Self Studies
Self Studies
Self Studies

Anatomy of Flowering Plants Test - 76

Result Self Studies

Anatomy of Flowering Plants Test - 76
  • 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
    Which one of the following is correct match?
    Solution
    The first xylem formed is called as protoxylem and later ones are called as metaxylem. The number of protoxylem groups in root, i.e., whether one, two, three, etc., is expressed in terms as monarch, diarch, triarch respectively. 
    Nicotiana tabacum is diarch.
    Trapa natans is monarch.
    Ricinus communis is pentarch.
    Pisum sativum is triarch. 
    Thus, the correct answer is option C.
  • Question 2
    1 / -0
    Choose the correct combination of labelling of hydathode.

    Solution
    A hydathode is a  secretory tissue found in the leaves of Angiosperms. These secretes the excess water through the pores of the epidermis or margin of the leaves and are present typically at the tip of marginal tooth of the leaves. Mainly found in aquatic plants and in some herbaceous plants that grows in moist places and are commonly seen in water lettuce, water hyacinth, rose, balsam etc. Made of a group of living cells with numerous intercellular spaces filled with water, hydathodes have few or no chloroplasts which represent modified bundle-ends called as epithem cells.
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    Which of the following meristem is derived from the promeristem?
    Solution
    The undifferentiated immature cells with the capacity to divide are called as meristems or meristematic cells. The meristems which chiefly found in clusters are grouped according to origin, position, angle of the cell division plane. Based on its origin, the meristems are further classified as pro-meristems, primary meristems and secondary meristems. Since, the continuously dividing cells of the shoot and root tip is made up of pro-meristems, both the primary meristems and the apical meristems are derived from pro-meristems.
    Thus, the correct option is D.
  • Question 4
    1 / -0
    The concept of four distinct zone of tissue builders on the root apex is called as
    Solution
    Tunica-Corpus theory is proposed by Schmidt for organisation of shoot apex. According to this theory, shoot apex can be differentiated in two regions as a central core and tunica which surrounds the central core. Central core contain large cells and divide irregularly and result in volume growth. However, tunica cells are smaller which divide to form surface layer.
    Dermatogen is a layer not a theory.
    Meristem is a layer not a theory. 
    Histogen theory is proposed by Hanstein. According to histogen theory, there are three zones as dermatogen, periblem and pleurome in shoot and root apical meristem. These three zones are considered as histogens or tissue builders. Each zone performs distinct functions and possesses group of initial cells. 
    Thus, the correct answer is option D.
  • Question 5
    1 / -0
    Fascicular or vascular cambium of dicots is 
    Solution
    The vascular bundles in dicotyledons are made up of various tissues of which the xylem and the phloem are the conducting tissues. Between these two is present an important layer of cells which are meristematic - the cambium. Since it lies between the vascular bundle it is called as fascicular cambium. These cambial strips are placed laterally with respect to the circumference of the stem.
    Thus, the correct answer is option B.
  • Question 6
    1 / -0
    Casparian strips occur in
    Solution
    Correct option: A
    Explanation:
    • Casparian strips are mainly composed of suberin and lignin.
    • They have the function of regulating the water and mineral uptake by roots.
    • These are present in the radial wall of the endodermis.
    • The endodermis is the central and innermost layer of the cortex.
    Hence, Casparian strips occur in "radial walls of endodermis".
  • Question 7
    1 / -0
    Actinostele is the modification of
    Solution
    The earliest vascular plants had stems with a central core of vascular tissue. This consisted of a cylindrical strand of xylem, surrounded by a region of phloem. Around the vascular tissue, there might have been an endodermis that regulated the flow of water into and out of the vascular system. Such, an arrangement is termed a protostele, which is the simplest type of stele. Actinostele is a variation of the protostele in which the core is lobed or fluted. This stele is found in many species of club moss. Actinosteles are typically exarch  and consist of several to many patches of protoxylem at the tips of the lobes of the metaxylem. Exarch protosteles are a defining characteristic of the lycophyte lineage.
    Thus, the correct answer is option A.
  • Question 8
    1 / -0
    Match the two lists and choose the correct option.
      List I (vascular bundle types)  List II (Plants)
     A Collateral and open 1 Cucurbita stem
     B Radial 2 Ferns
     C Bicollateral 3 Maize root
     D Concentric 4 Sunflower
    Solution
    Collateral bundles are vascular bundles 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 center. Collateral open vascular bundles are present in dicots, like sunflower. 
    Bicollateral vascular bundles have 2 patches of cambrium and one patch of xylem at the middle. This type of vascular bundles are found in plants of the family Cucurbitaceae and Solanaceae. 
    Concentric vascular bundles have one vascular element surrounding the other on all sides. These are mostly observed in ferns. These are of two types - leptocentric (Dracena and Yucca) and hydrocentric (Hydrilla). 
    Radial vascular bundle is observed in both dicot and monocot roots. Example- maize roots.
  • Question 9
    1 / -0
    In a transverse section of a dicot root
    Solution
    In dicotyledonous plants the root the xylem is exarch i.e. protoxylem is away from the center and metaxylem is towards the center. 
    Therefore, the correct answer is option A.

  • Question 10
    1 / -0
    In a dicot stem, pericycle gives rise to
    Solution
    • In dicot stem, the secondary vascular tissues originate as a result of the cambial activity. 
    • The cambial cells divide tangentially again and again and produce secondary tissues. 
    • Some of the cells of single-layered pericycle become meristematic, which divides and form a few layers of cells, phellogen.
    • Hence, In a dicot stem, pericycle gives rise to Phellogen.
    • So, the correct answer is 'Phellogen'.
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