Section-A
(Multiple Choice Questions) (08 Marks)
1. Choose the correct labellings for the parts X, Y and Z in the given
figure of the stages in embryo development in dicot:
Diagram
a) X is suspensor, Y is radicle and Z is cotyledon
b) X is radicle, Y is cotyledon and Z is suspensor
c) X is cotyledon, Y is suspensor and Z is radicle
d) X is zygote, Y is radicle and Z is cotyledon
2. In humans, the secondary oocyte completes meiotic division when:
a) It get Implanted in the uterine Endometrium
b) It is released from the matured Graafian follicle
c) It is fertilised by the sperm
d) Acrosomal enzymes breakdown the zona pellucida
3. A female undergoing IVF treatment has blocked fallopian tubes. The
technique by which the embryo with more than 8 blastomeres are
transferred into the female for further development is:
a ) ZIFT b) GIFT c) IUT d) AI
4. Remnants of nucellus are persistent during seed development in:
a ) pea b) groundnut c) wheat d) black pepper
Assertion and Reason type questions
5. Assertion: Primary endosperm nucleus is diploid.
Reason: It is the product of double fertilisation.
6. Assertion: Interstitial spaces outside the seminiferous tubules have
blood vessels and sertoli cells.
Reason: Sertoli cells provide nutrition to the germ cells.
7. Assertion: Saheli, an oral contraceptive for females , contains a
steroidal preparation.
Reason: It is a “ once a week “ pill with very few side effects.
8. Assertion: Parturition is induced by a complex neuroendocrine
mechanisms.
Reason: At the end of gestation period, maternal pituitary releases
Prolactin which causes uterine contractions.
Section-B
(Very Short Answer Questions) 06 Marks
9. State the function of filliform apparatus found in mature embryo sac of
an angiosperm.
10. Write the function of each of the following:
i) Middle piece in human sperm
ii) Luteinising hormone in human males
OR
How many sperms will be produced fromb10 primary spermatocytes
and how many eggs will be produced from 10 primary oocytes?
11. A mother of one year old daughter wanted to space her second
child . Her doctor suggested Copper-T (Cu-T). Explain its contraceptive
actions.
Section-C
(Short Answer Questions) 12 Marks
12. Make a list of any three outbreeding devices that flowering plants
have developed and explain how they help to encourage cross
pollination.
OR
With the help of labelled diagram, Show the different stages of embryo
development in a dicot plant.
13. Construct a flowchart exhibiting sequential events of oogenesis.
14. Explain the phases of menstrual cycle.
15. A woman has certain queries as listed below, before starting with
contraceptive pills. Answer them.
i) What do contraceptive pills contain and how do they act as
contraceptives?
ii) What schedule should be followed for taking these pills?
Scetion-D
16. (Case Study Based Questions) (04 Marks)
Pollination by Insects
Many adaptations are found in flowers to achieve certain kind of
pollination achieved by Insects is known as Entomophily. The given
diagram shows the cross section of an anther of an Insect pollinated
flower.
Read the given passage carefully give the answer of the following
questions.
1. What is the function of structure Y.
2. Which type of tissue found in the structure X
3. Name the layers of the mature anther.
OR
Give some examples of insect pollinated plants.
Scetion-E
(Long Answer Questions) 10 Marks
17. I) Explain the monosporic development of embryo sac in the
ovule of an angiosperm.
II) Draw a diagram of the mature embryo sac of an angiospermic ovule
and label any four parts in it.
OR
Describe in sequence the events that lead to the development of a 3-
celled pollen grain fom microspore mother cell in angiosperms.
18.
