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Tissues Test - 30

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Tissues Test - 30
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The meristerm which develops into primary vascular tissue is
    Solution
    Procambium lies inside the protoderm and develops into primary xylem and primary phloem. It also produces the vascular cambium and cork cambium.
    Therefore, the correct answer is option D.
  • Question 2
    1 / -0
    Which of the following is a complex tissue?
    Solution
    Xylem is a complex tissue because it is made up of more than one type of cell. Parenchyma, collenchyma, and sclerenchyma are simple permanent tissues.
    So, the correct answer is option C.
  • Question 3
    1 / -0
    The fibres of commercial importance are obtained from
    Solution
    Sclerenchyma is the tissue which makes the plant hard and stiff. It is the supporting tissue in plants and is composed of dead cells with highly thickened cell walls (due to extensive deposition of lignin).Two types of sclerenchyma cells exist: fibers and sclereids.
    Sclerenchyma fibers are of great economic importance, since they constitute the source material for many fabrics (e.g. flax, hemp, jute, etc).
    Hence the correct option is D.
  • Question 4
    1 / -0
    Pavement epithelium is another name for
    Solution
    Simple squamous cells have the appearance of thin, flat plates. They have horizontal flattened, elliptical nuclei because of the thin flattened form of the cell. As they consist of a single layer or flattened sac-like cells, it resembles 'pavement' and hence, simple squamous cells are called 'pavement epithelium'.
    Thus, the correct option is C.
  • Question 5
    1 / -0
    Cells of squamous epithelium are
    Solution
    Squamous cells have the appearance of thin, flat plates or they are tile-like. They have horizontal flattened, elliptical nuclei because of the thin flattened form of the cell. They are attached to each other like a mosaic.
    Thus, the correct option is C.
  • Question 6
    1 / -0
    The gap between two myelin sheath is known as:
    Solution
    Myelin sheath surrounds the axon of the nerve cell. It is a fatty white substance. It forms an insulating layer on the axon. It is formed by a process known as myelination. The gap between two myelin sheaths is known as the node of Ranvier. 
    So, the correct answer is option A.

  • Question 7
    1 / -0
    Multiple epidermis on dorsal and ventral side of the leaf is found in
    Solution
    In xerophytes, like Nerium, the protodermal cells divide periclinally to form multiseriate or multiple epidermises. The outermost layer of multiple epidermises are similar to the simple epidermis. Multiple epidermises in Nerium occur in both the upper and lower surfaces of the leaves. It is a xerophytic adaptation.
    Hence the correct option is D.
  • Question 8
    1 / -0
    Simple epithelium is:
    Solution
    Epithelial tissue that is only one cell thick is called the simple epithelium. 
    Simple squamous, simple cuboidal, simple columnar and simple pseudostratified are four types of simple epithelium. 
    Epithelium that is two or more cells thick is called the stratified epithelium. 
    Thus, the correct option is A.
  • Question 9
    1 / -0
    The cell which originates in bone marrow, circulates in blood for 1 - 2 days, migrates to connective tissue and forms macrophages is ---------------
    Solution
    Monocytes are a type of leukocytes or white blood cells, which play an important role in immune system. Generally, a low monocyte count is a good sign, and a high count indicates that a problem is present. These monocytes are made in the bone marrow and they spread through the body to connective tissues in one or three days. They can develop into dendritic cells or macrophages. Eosinophils and basophils are also formed in the bone marrow but they do not develop into macrophages.
    Thus, the correct answer is option (C), 'Monocytes'.
  • Question 10
    1 / -0
    Passage cells are present in
    Solution
    Passage cells are thin-walled unsuberized cells. They are found in the endodermis of vascular plants. They allow symplastic flow of solutes, such as calcium and magnesium into the stele.
    Hence the correct option is B.
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