SET: A
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 (5 Marks)
Q.1 Answer the following as per instructions (Attempt all questions)
i)If oogenesis occurs conventionally in a human, which one of the following
represents the correct ploidy levels of the primary and secondary oocytes? [2
Marks]
Primary oocytes Secondary oocytes
a) haploid diploid
b) diploid haploid
c) haploid haploid
d) diploid diploid
ii) For a breastfeeding mother, the chances of conception are very low.
Give reason. [2 Marks]
iii) Assertion: Tapetum is the innermost wall layer. It performs the function of
providing nourishment to the developing pollen grains. [1 Mark]
Reason: The cells of tapetum have dense cytoplasm and usually have more
than one nucleus.
I.Both assertion & reason are true and reason is the correct explanation of assertion.
II.Both assertion & reason are true, but reason is not the correct explanation of assertion.
III.Assertion is true and reason is false.
IV.Both assertion and reason are false
PART II (7x5= 35 Marks)
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 (5 Marks)
Q.1 Answer the following as per instructions (Attempt all questions)
i)If oogenesis occurs conventionally in a human, which one of the following
represents the correct ploidy levels of the primary and secondary oocytes? [2
Marks]
Primary oocytes Secondary oocytes
a) haploid diploid
b) diploid haploid
c) haploid haploid
d) diploid diploid
ii) For a breastfeeding mother, the chances of conception are very low.
Give reason. [2 Marks]
iii) Assertion: Tapetum is the innermost wall layer. It performs the function of
providing nourishment to the developing pollen grains. [1 Mark]
Reason: The cells of tapetum have dense cytoplasm and usually have more
than one nucleus.
I.Both assertion & reason are true and reason is the correct explanation of assertion.
II.Both assertion & reason are true, but reason is not the correct explanation of assertion.
III.Assertion is true and reason is false.
IV.Both assertion and reason are false
PART II (7x5= 35 Marks)
