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Morphology of Flowering Plants Test 21

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Morphology of Flowering Plants Test 21
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  • Question 1
    1 / -0
    Trichomes present on the roots are used for
    Solution
    The unicellular hair-like structures present on the surface of the root are known as trichomes. These are finger-like projections of the cells in the regions of the root. The trichomes act like the root hairs. They are involved in the process of absorption of water and minerals from the soil. They also help to increase the surface area for absorption. 
    Thus, the correct answer is option A. 
  • Question 2
    1 / -0
    The cells which contain the crystal of calcium carbonate is known as 
    Solution
    • Idioblasts are crystal-containing isolated plant cells. These are secretory in nature. The deposition of inorganic materials like calcium salts forms the crystal. It is involved in the storage of reserve food, pigments, minerals, latex, gum, resin, tannin, etc. 
    • Guard cells are two bean-shaped cells that surround stomata.
    • Bulliform cells are so-called because of their peculiar bubble shape. It mainly occurs on the upper surface of the leaves in monocots. Water present in these cells helps to maintain their shape, but losing turgor pressure during stress allows the leaves to roll up.
    • Silica cells are specialized leaf epidermal cells in grasses with almost the whole cell volume filled with solid silica.

    So, the correct answer is option 'Idioblast'.
  • Question 3
    1 / -0
    The leaf in which the stomata remains confined to lower surface of the leaf is known as
    Solution
    Amphistomatic: A leaf is said to be called as amphistomatic when the stomata is present on both the side of leaf.
    Hypostomatic: A leaf is said to be hypostomatic when the stomata is present on the underside of the leaf.
    Epistomatic: A leaf is said to be epistomatous where stomata are present on the adaxial surface only. Such type of leaf is found in aquatic plants where the leaves float on the surface of water, e.g. Nymphaea
    Thus the correct answer is option B.

  • Question 4
    1 / -0
    The leaf having stomata on both sides are known as 
    Solution
    Amphistomatic: A leaf is said to be called as amphistomatic when the stomata are present on both the side of the leaf.
    Hypostomatic: A leaf is said to be hypostomatic when the stomata are present on the underside of the leaf.
    Epistomatic: A leaf is said to be epistomatic where stomata are present on the adaxial surface only. Such type of leaf is found in aquatic plants where the leaves float on the surface of water, e.g. Nymphaea. 
    Thus the correct option is A.
  • Question 5
    1 / -0
    Monocot leaf can be distinguished from the dicot
    Solution
     Monocot leaf Dicot leaf
     (i) The monocot leaf is of isobilateral symmetry. The dicot leaf is of dorsiventral  symmetry.
     (ii) The bullifom cells are present on the upper epidermis.  The bulliform cells are absent.
     (iii) Stomata are equally distributed on both surfaces.  Stomata are present more in lower  surface and few on upper surface.
     (iv) In mesophyll cells, only spongy parenchyma is present with small intercellular spaces. Mesophyll cells are made up of  palisade parenchyma and spongy  parenchyma with large intercellular  spaces.
     (v) Bundle sheath is made up of parenchyma and just above and below sclerenchymatous cells are found. Bundle sheath is made up of  parenchyma and just above and below  the parenchymatous or  collenchymatous cells are found.
  • Question 6
    1 / -0
    A ........... leaf is a compound leaf that has smaller leaflets attaching to a common point.
    Solution
    There are simple and compound leaves. There are different types of compound leaves on the basis of the arrangement of the leaflets. The leaf which have smaller leaflets attached to the same or common point is known as palmately compound leaf. There may be different number of leaflets attached to the point. 
    Thus, the correct answer is 'Palmate'.

  • Question 7
    1 / -0
    In some plants like Nerium, stomata is present in a cavity known as 
    Solution
    Stomata are the openings surrounded by the guard cells, present in the epidermis of the leaves. It helps in the gaseous exchange in plants. The position of guard cells varies in different plants on the basis of climate. They are found in cavities, called stomatal crypts in Nerium oleander (non-succulent xerophyte). They are sunken (lower the epidermis) in xerophytic plants to recuce the water loss. They are found in grooves in Ericales lined with epidermal hair. So, the correct answer is 'Stomatal crypts'.
  • Question 8
    1 / -0
    The leaf in which the stomata remains confined to upper surface of the leaf is known as
    Solution
    Amphistomatic: A leaf is said to be called as amphistomatic when the stomata are present on both the side of the leaf.
    Hypostomatic: A leaf is said to be Hypostomatic when the stomata are present on the underside of the leaf.
    Epistomatic: A leaf is said to be epistomatic where stomata are present on the adaxial surface only. Such type of leaf is found in aquatic plants where the leaves float on the surface of water, e.g. Nymphaea
    Thus the correct answer is option B.
  • Question 9
    1 / -0
    The tall pillar-like mesophyll cells present in the internal parts of the leaf is known as 
    Solution
    The tissue which is found in the leaves of the plants is called as the mesophyll tissue. There are two type of mesophyll tissues found in the leaves of dicot plants. There are tall and pillar-like cells of parenchyma which are known as palisade parenchyma. These cells are arranged compactly near the upper epidermis. There are loosely arranges spongy parenchyma cells near the lower epidermis. 
    Thus, the correct answer is 'Palisade parenchyma'.

  • Question 10
    1 / -0
    The air spaces in the leaf is created by 
    Solution
    • The spongy tissue that forms air spaces between the cells of leaves, stems, and roots of some plants is called aerenchyma cells. 
    • It helps in the gaseous exchange and also provides buoyancy to the aquatic plants. 
    • Chlorenchyma is the parenchymatous tissue that contains chloroplasts and is photosynthetic.
    • Palisade parenchyma is the upper layer of ground tissue in a leaf. It consists of elongated cells and can perform photosynthesis as it contains chlorophyll. It is an example of chlorenchyma.

    So, the correct option is 'Aerenchyma'.
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