HSC Biology 2nd Paper Model Question-2

Time : 3 hrs.                                                                                                                               Marks. 75

[N.B. The figures in the right margin indicate full marks. Draw labeled diagram if necessary. Answer the different parts of the same question Chronologically.]

Group - A :  ( Broad Type)

1.         a)         Describe the structure and function of a typical chromosome.                                              9

            b)         Mention the difference between spermatogenesis and Oogenesis.                                        6

OR,     a)         Explain Mendel's first law with example.                                                                               5

            b)         Write down the main differences between striated and non striated muscle.                        5

            c)         Write down the histological characteristics of stomach and kidney.                                                 5

2.         a)         Describe the necessities of two hosts in the life cycle of malarial parasite.                            5

            b)         Describe the structure and function of malpighian tubule.                                                     5

            c)         Write down the differences between coelom and coelenteron.                                             5

OR,     a)         Mention the differences between asexual and sexual cycle of malarial parasite.                   5

            b)         Write down the differences between male and fermale cockroach.                                       5

            c)         Write down the differences between trachea and tracheole.                                                             5

3.         a)         Draw a labeled diagram of the L. S. of an eye.                                                                      6

            b)         What is Nephron? Describe the structure and function of a nephron.                       1+8 = 9

OR,     a)         What is cardiac cycle? Describe the different stages of cardiac cycle.                      2+8 =10

            b)         Describe the problems caused by air pollution.                                                                      5

Group B : (Short Type)

4.         Mention the differences between artery and vein.                                                                             5

OR,     Write the differences between rod cell and cone cell.

5.         Mention the functions of skeleton.                                                                                                     5

OR,     Describe the geographical boundaries of palaearctic region and mention any 03 name of endemic

            animals of it.  

6.         What is pearl? Write down any four scientific name of pearl producing mussel.                              5

OR,     What is placenta? Describe the functions of it.

7.         Distinguish between a diploblastic and triploblastic animal.                                                              5

OR,     Define dental formula. Write down the dental formula of an adult man.

8.         Mention the mechanism of maintaining balance of the body.                                                            5

OR,     Describe the process of digestion of protein type food in the small intestine of man.

9.         Write down the differences between cerebrum and cerebellum.

OR,     Write down the full meaning of ADH, ATP, FAD, ACTH, FSH.