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Plant Kingdom Test - 78

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Plant Kingdom Test - 78
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  • Question 1
    1 / -0
    If photosynthesizing green algae are provided with $$Co_2$$ synthesized with heavy oxygen(^{18}O$$, later analusis will show that all but on of the following compunds produced by the algae contain the ^{18} label. That one is
    Solution
    During plant photosynthesis, 2 equivalents of glycerate 3-phosphate (GP; also known as 3-phosphoglycerate) are produced by the first step of the light-independent reactions when ribulose 1,5-bisphosphate (RuBP) and carbon dioxide are catalyzed by the rubisco enzyme. The GP is converted to D-glyceraldehyde 3-phosphate (G3P) using the energy in ATP and the reducing power of NADPH as part of the Calvin cycle. This returns ADP, phosphate ions Pi, and NADP+ to the light-dependent reactions of photosynthesis for their continued function. RuBP is regenerated for the Calvin cycle to continue.
    So the correct option is 'PGAL'.
  • Question 2
    1 / -0
    Which group of plantae includes atracheophytic embryophytes?
    Solution
    In the plant kingdom atracheophytic embryophytes are bryophytes. Thye do not contain vascular tissues and produce embryo in their life cycle.
    So, the correct option is 'Bryophyta'.
  • Question 3
    1 / -0
    First true land plants are
    Solution
    The first true land plants were non-vascular plants such as mosses and liverworts that appeared in the early Ordovician period. 
    So, the correct answer is 'Mosses'
  • Question 4
    1 / -0
    A group of plants which are autotrophs their sex organs are non- jacketed and whose zygotes secretes thick wall are called :
    Solution

    In thallophytes, sex organs are unicellular. non jacketised.  Sexual reproduction leads to the formation of zygote, later it secrets a thick wall and form into a zygospore.
    So, the correct option is 'Thallophytes'.
  • Question 5
    1 / -0
    Largest moss is
  • Question 6
    1 / -0
    Which one classification system is based on fossil records also besides other criteria?
    Solution
    Artificial system of classification is based on morphological features.
    Natural system is based on both morphological features and sexual characteristics.
    Karyotaxonomy is a classification based on the cell structure and number of chromosome.
    Hence the correct answer is phylogenetic system, option B.
  • Question 7
    1 / -0
    Which of the following is not a product of fertilization.
    Solution
    Asexual reproduction in algae is the production of progeny without the union of cells or nuclear material. Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by spores. 

    So, the correct option is 'zygote in algae'
  • Question 8
    1 / -0
    Unicellular algae X and Y of the same species were taken, experimentally chloroplasts were removed from cell X. After some time, they both were kept in bright sunlight for a few hours and then the iodine test was performed on them. What will be the result?
    Solution
    • Iodine test is a test done to test the presence of starch in the given sample. If starch is present in the sample, the blue-black colour is developed upon the addition of iodine solution. 
    • Chloroplasts are the organelles present in the photosynthetic algae and plants. They synthesis carbohydrates by the process of photosynthesis. When chloroplast is removed from the algae X, no photosynthesis will take place even after keeping it in bright sunlight. Hence, the cell X will not turn blue-black in colour. 
    • However, when algae Y is kept under bright sunlight, photosynthesis takes place and starch is produced. Hence, cell Y will turn blue-black upon the addition of iodine solution.

    Thus, the correct answer is 'Cell Y will turn blue-black.'
  • Question 9
    1 / -0
    Phenetic classification is based on?
    Solution
    In phenetic classification, organisms are classified into various groups based on their morphological similarities. This classification does not take into consideration the phylogenic similarities or links between the organisms. It is also known as taximetrics.

    So, the correct answer is 'Observable characteristics of existing organisms'.
  • Question 10
    1 / -0
    In fern sex organ are found on :-
    Solution
    The antheridium (male organ) is located on the lower surface of the fern prothallus and the archegonium (female organ) is located on the upper surface of the fern prothallus.
    So, the correct option is 'prothallus'.
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