Paper Biology Chapter
18 Reproduction
TEST NO----------------- Date:
……….
Paper Setter: Mahr
Sagheer Total Marks: 25
Class: FSc. Part II Roll No: ……………… Time
allowed: 1 hour
Note:
Attempt all questions.
Q .No.1: Answer the
following short questions: (12)
i.
Write the role of hormones in ovulation.
ii.
Define menopause.
iii.
What is ovoviviparity?
iv.
Define fraternal twins.
v.
What is after birth?
vi.
How pregnancy is maintained? Give role of hormones.
Q .No.2: a) Write
a note on sexually transmitted diseases. (4)
b) Describe the role of phytochromes. (4)
Q .No.3: Four possible answers are given. Tick (Ö ) the best option. (5)
i.
Reproduction is important for the survival of:
a) Individual b) species c) Population d) Both b & c
ii.
Methods of asexual reproduction are:
a) Apomixis b)
Artificial propagation
c) Sporulation d)
All of these
iii.
Pinus sylvesteris belongs to:
a) Gymnosperms b) Angiosperms c) Both a & b d) None of these
iv.
Antipodal cells
are fertilized by:
a) Pollen tube b) Tube nucleus c) generative nucleus d) none
v.
Developing seeds are rich source of:
a) Auxins b) Abscicic acid c) Ethene d) All of these
Answer Key
Q. No. 1: Four possible
answers are given. Tick (Ö ) the best
option. (5)
i.
Reproduction is important for the survival of:
a) Individual b)
species c) Population d) Both b & c
ii.
Methods of asexual reproduction are:
a) Apomixis b)
Artificial propagation
c) Sporulation d) All of these
iii.
Pinus sylvesteris belongs to:
a)
Gymnosperms b) Angiosperms c) Both a & b d) None of these
iv.
Antipodal cells
are fertilized by:
a) Pollen tube b) Tube nucleus c) generative nucleus d)
none
v.
Developing seeds are rich source of:
a)
Auxins b) Abscicic acid c) Ethene d) All of these
Q.
No. 2: Answer the following short questions: (12)
i.
Role of
hormones in ovulation: FSH released from pituitary stimulates the secretion of estrogens from
ovary. Estrogens cause the vascularization of endometrium and inhibition of FSH.
The decreased level of FSH and increased level of estrogens causes the pituitary
to release Luteinizing Hormone (LH) which induces the ovulation (the release of
ovum from follicle). (see page 99)
ii.
Menopause: In human, the end or
complete stoppage of menstrual cycle is called menopause after which the female
stops menstruation and producing ovum (see page 99 FSc Biology Book 2nd).
iii.
Ovoviviparity: The development of embryo
within the egg, within the uterus of mother and at the completion of development
the hatching of young one from the laid ovum is called ovoviviparity. In Duckbilled
Platypus, Echidna etc ovoviviparity occurs (see page 96 FSc Biology Book 2nd).
iv.
Fraternal twins: During the development in
some case, more than one ova escape the follicle ateresia. Therefore more than
one embryos or fetus’ os off spring develop which are called fraternal twins (see
page 94 FSc Biology Book 2nd).
v.
After birth: Within 10 to 45 minutes
after the birth, uterus contracts and placenta is separated from the wall of
uterus which passes out of the body of mother through vagina. This is called
after birth. Bleeding throughout this period is controlled by contraction of
smooth muscle fibers which completely surround all the uterine blood vessels supplying
the placenta. The average loss of blood during birth is about 350 cm3 (see
page 94 FSc Biology Book 2nd).
vi.
Role of
hormones in maintenance of pregnancy: The fertilized ovum starts its development and is
attached with the wall of uterus. This attachment is called implantation or
conception. This leads to establishment of placenta, a tissue formed between
the embryo and uterine wall. Placenta secretes progesterone hormone which
maintains the pregnancy (see page 100 FSc Biology Book 2nd).
Q .No.3: a) Write a
note on sexually transmitted diseases. (4)
b) Describe the role of phytochromes. (4)
please open the following link for more question papers:
www.bioshiggi.com
www.bioshiggi.com
