SET B
CYCLIC EXAMINATION
CLASS XII BIOLOGY
MAX. MARKS: 40 TIME: 1.15 HRS.
NAME____________ CLASS_____SECTION__________ ROLL NO.
This paper comprises of two Parts- I and II. Answer all Questions
PART I (5x2= 10 Marks)
Q.1 Answer the following as per instructions (Attempt all questions):
i)Which organic material makes the exine of pollen grains resistant
to high temperature? Also give the nature of intine.
ii)A flower of papaya plant produces 360 viable seeds through sexual reproduction.
What will be the minimum number of megaspore mother cells involved in the
formation of these seeds?
a)90 b)180 c)270 d)360
iii) How is milk production in human females hormonally regulated?
iv) During fertilization, hundreds of sperms are in the vicinity of the egg cell
but only one sperm enters the cell. How is this achieved?
v) In a figure for a stage in the formation of pollen grain, answer:
Name the cell that undergoes further division to make gametes.
What is the name and function of the other cell?
PART II (6x5= 30 Marks)
Q.2 Mention the significant functions of human placenta.
Q.3 Draw a well labeled diagram of L.S. anatropous ovule.
Q.4 Give a diagrammatic representation of T.S. human ovary.
Q.5 In the diagram with various phases of the menstrual cycle
in human beings.
i)Identify the plotlines that represent the following:
CYCLIC EXAMINATION
CLASS XII BIOLOGY
MAX. MARKS: 40 TIME: 1.15 HRS.
NAME____________ CLASS_____SECTION__________ ROLL NO.
This paper comprises of two Parts- I and II. Answer all Questions
PART I (5x2= 10 Marks)
Q.1 Answer the following as per instructions (Attempt all questions):
i)Which organic material makes the exine of pollen grains resistant
to high temperature? Also give the nature of intine.
ii)A flower of papaya plant produces 360 viable seeds through sexual reproduction.
What will be the minimum number of megaspore mother cells involved in the
formation of these seeds?
a)90 b)180 c)270 d)360
iii) How is milk production in human females hormonally regulated?
iv) During fertilization, hundreds of sperms are in the vicinity of the egg cell
but only one sperm enters the cell. How is this achieved?
v) In a figure for a stage in the formation of pollen grain, answer:
Name the cell that undergoes further division to make gametes.
What is the name and function of the other cell?
PART II (6x5= 30 Marks)
Q.2 Mention the significant functions of human placenta.
Q.3 Draw a well labeled diagram of L.S. anatropous ovule.
Q.4 Give a diagrammatic representation of T.S. human ovary.
Q.5 In the diagram with various phases of the menstrual cycle
in human beings.
i)Identify the plotlines that represent the following:
