7 to 11

Q7. All mammals have 

          (1) Mammary glands                  (2) Diaphragm

          (3) Vertebrae                               (4) All of these


Q8. Egg laying mammal is 

         (1) Omithorhyncus                       (2) Didelphys

         (3) Oryctolagus                            (4) Macropus

Q9. Double circulation and absence of renal portal system is the feature of 

         (1) Balaanoptara                            (2) Frog

         (3) Lizard                                       (4) Both (2) and (3)

Q10. Which of the following is not a feature of all adult mammals ?

           (1) Vertebrae

           (2) Dense hair

           (3) External ear

           (4) Both (2) & (3)

Q11. Consider the following features :

          (A) Presence of hair in any stage of life

          (B) Secondary palate

          (C) Corpus callosum

          (D) Diaphragm

         How many of above features are present in all mammals?

          (1) Only (A)

          (2) (A) & (B)

          (3) (A), (B) & (C)

          (4) (A), (B) & (D)
 

Dear student.

Please find the solution below.

7. 4. All of these. 

All the structures mentioned in the question are present in mammals.

8. 1. Ornithorhynchus.

Ornithorhynchus, also known as platypus is an egg laying mammal.

Please ask questions in separate thread.

Regards.


 

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