Structural Organisation in Animals | Unit Test - 4 Sets of PDF QPs in one page with answer key I Class 11

➡️ Unit Test - 4 Sets of PDF QPs Download

Set A (Max. score: 10)

1. Forelimbs of frog: 4 digits
   Hind limbs of frog: ………………. (1)
2. Frogs are not usually seen during peak summer and winter. Why? (2)
3. Odd one out. Justify your answer. (2)
   Bile duct, conus arteriosus, oesophagus, microvilli
4. Write the function of the given structures in frog. (2)
   1. Nictitating membrane
   2. Feet with webbed digits
5. Observe the diagram showing internal organs of frog and complete digestive system. Label A to F. (3)

Set A ANSWER KEY

1. 5 digits
2. During this period, they take shelter in deep burrows to protect them from extreme heat and cold. This is called summer sleep (aestivation) and winter sleep (hibernation).
3. Conus arteriosus. Because it is a part of frog’s circulatory system. Others belong to digestive system.
4. 1. It protects the eyes of frog while they are in water.
   2. It helps in swimming.
5. A = Liver
   B= Rectum
   C= Cloaca
   D= Ureter
   E= Lung
   F= Gall bladder

Set B (Max. score: 10)

1. Summer sleep: Aestivation
   Winter sleep: …………. (1)
2. Frogs have several economic importance. Justify. (2)
3. Mention any two differences between frog heart and human heart. (2)
4. Draw a flowchart showing the correct sequence of various parts of frog’s alimentary canal. (2)
5. Observe diagram of reproductive system of male frog. (3)

   

   1. Label A to D.
   2. Reproductive system of male frog has functional connection with its excretory system. Justify.

Set B ANSWER KEY

1. Hibernation
2. They eat insects and protect the crop.
   Maintain ecological balance by serving as an important link of food chain and food web.
   In some countries, the muscular legs of frog are used as food.
   (Any 2)
3. Two differences between frog heart and human heart:

   Frog heart	Human heart
   Three-chambered.	Four-chambered.
   Has the structures sinus venosus and conus arteriosus.	Absent

4. Mouth → buccal cavity → pharynx → oesophagus → stomach → intestine → rectum → cloaca.
5. 1. A= Vasa efferentia
      B= Testis
      C= Urinogenital duct
      D= Cloaca
   2. Yes. Vasa efferentia arising from testes enter the kidneys and open into Bidder’s canal. It communicates with urinogenital duct that comes out of the kidneys and opens into cloaca.

Set C (Max. score: 10)

1. In male frogs, testes are adhered to the upper part of kidneys by a double fold of peritoneum called …………………. (1)
2. Frogs exhibit sexual dimorphism. Justify this statement giving two examples. (2)
3. Arrange the following words into two groups and give an appropriate heading to each group. (2)
   Testes, oviduct, ovaries, vasa efferentia
4. In frogs, the alimentary canal is short. Why? (2)
5. Complete the chart using appropriate terms. (3)

Set C ANSWER KEY

1. Mesorchium
2. In male frogs, there is a sound producing vocal sac and a copulatory (nuptial) pad on the first digit of fore limbs. These structures are absent in female frogs.

3. Frog: Male reproductive system	Frog: Female reproductive system
   Testes Vasa efferentia	Oviduct Ovaries

4. Frogs are carnivores and hence the length of intestine is reduced.
5. A= Spinal cord
   B= Hind-brain
   C= Olfactory lobes
   D= Diencephalon
   E= Optic lobes
   F= Medulla oblongata

Set D (Max. score: 10)

1. Name the larval stage in the development of frog. (1)
2. In animals such as frogs, the cloaca is an important structure for three physiological systems. Do you agree? Justify. (2)
3. Rearrange in correct sequence. (2)
   Cloacal aperture →Urinary bladder →Kidneys → Cloaca → Ureters
4. Circulatory systems of frog and human show fundamental similarity. Justify. (2)
5. Observe the diagram of reproductive system of female frog. (3)

   

   1. Label A to E.
   2. Which reproductive organ is common in male and female?

Set D ANSWER KEY

1. Tadpole
2. Yes. I agree. Cloaca is a part of digestive system, excretory system and reproductive system because this chamber is used to pass faecal matter, urine and gametes (sperms or eggs) to the exterior.
3. Kidneys → Ureters → Urinary bladder → Cloaca → Cloacal aperture.
4. Circulatory systems of frog and human have the following structures:
   • Blood vascular system (heart, blood vessels & blood) and lymphatic system (lymph, lymph channels & lymph nodes).
   • Arterial system to pump blood from heart to all body parts.
   • Venous system to carry blood from various body parts to the heart.
   (Any 2 points)
5. 1. A= Oviduct
      B= Ovary
      C= Ova
      D= Cloaca
      E= Cloacal aperture
   2. Cloaca.