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Plant Kingdom Test - 79

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Plant Kingdom Test - 79
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  • Question 1
    1 / -0
    Read the following statements. Find out how many statements are correct.

    (A) As the producer's algae are of paramount importance.
    (B) The male sex organ of Chara is known as nucule and the female sex organ is known as globule.
    (C) The cell wall of algae is made up of cellulose, pectin, galactans, and mannans.
    (D) In Volvox, the colony is called coenobium.
    (E) On the basis of pigments, red algae are similar to blue green algae.
    Solution
    As the producer's Algae are of Paramount importance as they account for a major fraction of light absorption, photosynthesis, and respective biomass production.
    The male sex organ of Chara is known as globule and the female sex organ is known as nucule.
    The cell wall of algae is made up of cellulose, pectin, Galatians, and mannans.
    In Volvox, the colony is called coenobium. A coenobium colony has a fixed number of members or cells.
    On the basis of pigments, red algae are not similar to blue-green algae.
    So, the correct answer is 'Three'.
  • Question 2
    1 / -0
    Name the phenomenon that governs the following-
    Solution
    Green beetles living in green bushes are camouflaged by their surroundings and are hence not eaten by the crows. This is a defense strategy employed by the beetles in order to escape predation. In the F1 generation crossing homozygous dominant (pure tall) and homozygous recessive (pure dwarf) plants will result in the heterozygous condition (Tt) with a phenotype of all tall plants as they will still have the dominant genotype. Removal of tails cannot be passed on from one generation to another, as it is not a heritable change and not a part of the genetic makeup of the organism. The isolation of an organism by a geographical barrier such as a river is called allopatry and hence governs the speciation of a sub-population such as blue beetles from green beetles. When a  migrant beetle reproduces with the local population the genes of migrant beetle enter the new population by the means of gene flow (also known as gene migration or allele flow) is the transfer of genetic variation from one population to another.  
    So the correct answer is Green beetles living in green bushes are not eaten by the crows.
  • Question 3
    1 / -0
    Which of the following is commonly present in fresh water?
    (A)- Ulothrix
    (B)- Spirogyra
    (C)- Ectocarpus
    (D)- Batrachospermum
    Solution
    Algae are the group of thallophytes, they are carriers of chlorophyll and have simple body structure. There are a few examples given, they are:
    • Ulothrix - They are green, filamentous algae, mostly found in freshwater with low salinity areas like; ponds, lakes etc.
    • Spirogyra - They belong to the largest group of green algae and are commonly found in freshwater bodies like; deep ponds, rivers etc.
    • Ectocarpus - They belong to the group of brown algae and mostly found in the colder wetlands. They are commonly found in marine water bodies.
    • Batrachospermum - They are from the group of red algae, most of the members of red algae are found in marine water but few are found in fresh water. E.g.; Batrachospermum.
    So, the correct option is 'Ulothrix, Spirogyra, and Batrachospermum'
  • Question 4
    1 / -0
    Plant body of liverworts is
    Solution
    • Thalloid liverworts have a ribbonlike, or strap-shaped, body that grows flat on the ground.
    • The thallus is dorsiventral and intently closed to the substrate. The plant body of liverworts is a thalloid in Marchantia.
    • So, the correct answer is option B.
  • Question 5
    1 / -0
    A. True roots, stem or leaves are not present
    B. The female sex organ is known as archegonium
    C. Union of gametes occurs in the presence of water
    Which of the above-mentioned characters are common in both Thallophytes and Bryophytes?
  • Question 6
    1 / -0
    Which of the following algae are found in deepest ocean waters?
    Solution
    A. Red algae
    Solution : Red algae are to be found in the deepest ocean waters because it contains phycoerythrin pigment that absorbs blue light which penetrates the most deep waters for photosynthesis and appears red because it reflects red light.
    So the correct answer is "Red algae".
  • Question 7
    1 / -0
    Mosses are gregarious in nature, because?
  • Question 8
    1 / -0
    Zoospores produced in Ectocarpus are?
    Solution
    D. Both (1) and (3)
    Solution: Zoospores are motile spores produced by algae that helps in asexual reproduction and they are pyriform or pear shaped in Ectocarpus.
    So the correct answer is "Both (1) and (3)".
  • Question 9
    1 / -0
    The overgrowth of algae due to phosphate can take up the oxygen in water and kill other aquatic life. This is called ________.
    Solution
    D. Eutrophication
    Solution : Eutrophication is the killing of aquatic life due to overgrowth of algae from fertilizers washed up into the ponds and lakes from nearby farmlands. Algae use up the dissolved oxygen from the water and thus the aquatic life dies due to oxygen starvation.
    So the correct answer is "Eutrophication".
  • Question 10
    1 / -0
    Which one of the following is a correct statement?
    Solution

    Correct Option: D

    Explanation:

    • The seed habit is a process in which the germination of megasporangium is done to form a female gametophyte that is traced in pteridophytes.
    • In gymnosperms, female gametophyte is germinated from megaspores.
    • Antheridiophores and archegoniophores are present in bryophytes, not pteridophytes.
    • The gametophyte of pteridophytes do not exibit a protonemal and leafy stage.

    Hence, origin of seed habit can be traced in pteridophytes.
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