Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Sexual Reproduction in Flowering Plants Test - 39

Result Self Studies

Sexual Reproduction in Flowering Plants Test - 39
  • 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
    In angiosperms, endosperms is formed by 
    Solution
    In angiosperms, double fertilization occurs as a result of triple fusion. Endosperm, which is triploid in nature is formed as a result of division of fused polar nuclei and haploid male gamete.
  • Question 2
    1 / -0
    Milky water of green coconut is
    Solution
    Correct Option: C
    Explanation:

    • The endosperm is the tissue produced inside the seeds of most of the flowering plants following fertilization. 
    • It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. 
    • Coconut endosperm is coconut water, the liquid endosperm of green coconuts. 
    • It has been freeze-dried to a free-flowing powder form using a patented lyophilization process which produces a stable composition retaining the inherent biological activity of its nutrients and growth factors. 
  • Question 3
    1 / -0
    In which one of the following would you expect to find glyoxysomes?
    Solution
    Glyoxysomes are the special type of peroxisomes which are found in plant cells. It is mainly present in cells where fat conversion takes place. Glyoxysomes are the microbodies that contain enzymes for the beta-oxidation of fatty acids and glyoxylate pathways. It is quite abundant in germinating oilseeds. They are basically responsible for the glyoxylate cycle in which fat is converted into carbohydrates. It can be found in seeds containing fats and oils like corn, soybean, sunflower, peanut, castor, and pumpkin. So, glyoxysomes are found in the endosperm of castor because it contains oil. In castor seeds, endosperm persists in the mature seed and can be used during seed germination. 
  • Question 4
    1 / -0
    Apomictic embryos in Citrus arise from 
    Solution

    Correct option: C
    Explanation:

    • Apomixis is a kind of asexual reproduction in which viable embryo is formed within the confines of the seed coat, without meiosis and syngamy.
    • Adventive embryony is a type of Apomixis found in citrus in which there is the formation of extra embryos due to sporophytic budding.
    • One or more diploid sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos.
    • Hence, in Citrus apomictic embryos arise from maternal sporophytic tissue in the ovule. 
  • Question 5
    1 / -0
    Endosperm of gymnosperm is ..............
    Solution

    Correct option: C

    Explanation:
     The endosperm of gymnosperms is haploid as it is produced by the female gametophyte before fertilization takes place. Hence, the endosperm of a gymnosperm is haploid is the correct answer.

  • Question 6
    1 / -0
    Presence of many embryos (polyembryony) is a characteristic feature of
    Solution
    • The phenomenon of the development of one or more embryos from one fertilized egg is polyembryony. 
    • Polyembryonic seed development in citrus is because of the apomictic process where many maternally derived embryos arise from the nucellus surrounding the developing zygotic embryo. 
    • Whereas mango reproduces by the normal fertilization process and banana by parthenocarpy.

    Thus, the correct answer is option A.
  • Question 7
    1 / -0
    Xenia and metaxenia terms are related with 
    Solution
    Xenia and metaxenia, are related to pollen. Xenia means the direct effect of the pollen grains on the seeds and fruits, outside the embryo. Metaxenia is the effect of pollen grain on the testa and fruit wall. Example for xenia - maize and date palm is an example for metaxenia.
    So, the correct answer is option D.
  • Question 8
    1 / -0
    Arrange the following in the order of their location from periphery to centre in the entire dicotyledonous plant body ______________.
  • Question 9
    1 / -0
    When vegetative cell forms embryo without fertilization, it is called as 
    Solution
    Polyembryony is the occurrence of more than one embryo in a seed whereas adventive polyembryony is the formation of embryo directly from the diploid sporophytic cell or vegetative cell. It takes place without the involvement of processes like meiosis and mitosis. For example, in citrus 40 embryos are formed out of which one embryo is formed by fusion while others are adventive.
    Apogamy is the development of 1 n sporophytes without gametes and syngamy from vegetative cells of the gametophyte.
    Apospory is the development of 2 n gametophytes, without meiosis and spores, from vegetative, or nonreproductive, cells of the sporophyte.
    Diploid polyembryony occurs when a diploid embryo is formed by the polyembryony without normal fusion and meiosis.
    So, the correct answer is option D. 
  • Question 10
    1 / -0
    Endosperm in angiosperm (flowering plants) are ..............
    Solution
    In angiosperms, double fertilization occurs and as a result of that triple fusion takes place. This produces a triploid endosperm and a diploid zygote.

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