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Structural Organisation in Animals Test - 74

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Structural Organisation in Animals Test - 74
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Weekly Quiz Competition
  • Question 1
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    Which of the following is largest part of cockroach's leg?
  • Question 2
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    A pair of triangular muscles in each segment, present on either side of heart in cockroach, is of?
    Solution
    A. Alary muscles
    Reason: Alary muscles are so named as they have delta or wing-like structures in some insects. It's contraction and respiratory movements of abdomen increase the pumping force of the Cockroach's heart. It lies immediately on the top of the the dorsal diaphragm. The dorsal vessel present in the cockroach's abdomen called as heart. The contraction of alary muscles causes hemolymph to flow into the pericardium from perivisceral cavity and then into the heart.
  • Question 3
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    Fat storing cells are present in ____________
    Solution
    Fat storing cells called adipocytes make up the adipose tissues. Their main function is to store energy in form of fat.
    So, the correct option is C.
  • Question 4
    1 / -0

    Integumentary nephridia are also called ________________.

    Solution
    Integumentary nephridia are also Enteronephric. They discharge the waste products directly into the buccal cavity and pharynx from where these are passed outside with undigested food through the anus. So they are called Enteronephric nephridia. 
  • Question 5
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    Joined filamentous structures, present on tergum of $$10^{th}$$ segment in both male and female cockroach are
    Solution
    D. Anal cerci
    Reason: Anal cerci are a pair of appendages which arise from 10th segment of the body of the cockroaches (abdominal portion). These are found in both male and female. These are pincer shaped, multi segmented appendages. Anal cerci important sense organ of the organism as they are wind sensitive and can detect vibrations.
  • Question 6
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    Select the option with correct matching.

    Solution
    • The mouthparts of the cockroach are labrum (upper lip), a pair of mandibles, a pair of maxillae and a labium (lower lip). A median flexible lobe, acting as the tongue (hypopharynx), lies within the cavity enclosed by the mouthparts.
    • A-(v)Maxilla- A pair of first maxillae is located behind mandibles on either side of the mouth. The first maxilla has two basal segments called cardo and stripes. Cardo is attached to the head capsule and stipes is attached to the cardo. The stipes has five segmented maxillary palp on its outer side.
    • B-(iii)Labium- Labium is formed by the fusion of the second pair of maxillae. It is also known as the lower lip. Labium includes two segments namely broad rectangular sub-mentum and a triangular mentum. Also, pre-mentum is present in front of the mentum. Pre-mentum is formed by the fusion of two stipes and it bears a small sclerite called palpiger. Each palpiger has a 3-segmented labial palp. At the distal end, the pre-mentum bears a pair of paraglossae inner to labial palps. A pair of glossae is present between paraglossae. The paraglossae and glossae together constitute ligula.
    • C-(i)Mandible-These are a pair of triangular, hard, unjointed, stout, chitinised structures located on either side of the mouth behind labrum. Mandibles are masticatory in function.
    • D-(ii)Labrum-Labrum is also called an upper lip. The mouth is covered by labrum. The labrum helps in tasting and also handling the food.
    • E-(iv)Hypopharynx-Hypopharynx or ligula or tongue is chitinous, grooved and a rod-like structure found hanging into the preoral cavity. Hypopharynx divides the proximal part of the preoral cavity into a larger anterior cibarium and a posterior salivarium. The salivary duct opens into salivarium at the base of the hypopharynx.
    • So, the correct answer is 'A-(v), B-(iii), C-(i), D-(ii), E-(iv)''.
  • Question 7
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    Choose the wrong statement
    Solution
    Epithelial tissues do not have intercellular spaces between them, rather cells are tightly fit together to make a continuous sheet.
    So, the wrong statement is 'Epithelial tissues have intercellular space between them'
  • Question 8
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    Mark the correct one regarding typhlosole.
    Solution
    A typhlosole is an internal fold of the intestine or inner intestinal wall. In earthworm it is a dorsal flap of the intestine that runs along most of its length, effectively forming a tube within a tube, and increasing the surface area for absorption. It runs mid-dorsally from 27th to last 25 segments.
    So, the correct answer is 'Increases the surface area for absorption'.
  • Question 9
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    Select the option having correct matching of parts of the digestive tract of cockroach.

    Solution
    B. A-Crop, B-Hepatic cecae, C-Malpighian tubules, D-Rectum
    Reason: Alimentary canal in cockroach is divided into three regions. Those are Foregut, Midgut and Hindgut. Foregut includes Mouth cavity, Pharynx, Oesophegus, Crop, and Gizzard. Midgut is a tube like structure. Hepatic cecae and Malpighian tubule are found at the junction of Midgut and Hindgut. Hindgut is divided into three parts, Ilium, Colon and Rectum.
  • Question 10
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    Select the option having correct matching for different parts of male reproductive system of cockroach.

    Solution
    A-Phallic gland-It is a long and club-shaped accessory gland. It's anterior broader end lies in the 6th segment slightly to the right of the nerve cord. It narrows posteriorly into a tubular structure and finally tapers to open by a separate aperture located close to the male gonopore at the hind end of the body.
    B-Seminal vesicle-Seminal vesicles are located upon ejaculatory duct. They collect and store sperms from the testis.
    C-Vas deferens-from each testis arises a thin thread-like, white vasa deferens. Both the vasa deferentia pass backwards almost to the posterior end of the abdomen and then bend forwards to meet in the middle and open into an ejaculatory duct.
    D-Ejaculatory duct-The ejaculatory duct is an elongated wide median duct which runs backwards in the abdomen and opens out by male gonopore situated ventral to the anus.
    So, the correct answer is 'A-Phallic gland, B-Seminal vesicle, C-Vas deferens, D-Ejaculatory duct'.
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