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12th Zoology English Medium 2nd Assignment July 2021 Answerkey
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Assignment
Class-12 Subject:Bio – zoology
Unit 1
Chapter 2. Human reproduction
Part – A
I.One Mark Questions
1.The attachment of blastocyst to the uterine wall is called
a) Fertilization b) Organogenesis
c) Implantation d) Insemination
2.Testis is covered by an outermost layer
a) Tunicaalbuginea b) Perimetrium
c) Fimbriae d) Vitelline membrane
3.The primary female sex organ is
a) Endometrium b) Clitoris
c) Ovaries d) Mammary gland
4.The ovary remains attached to the pelvic wall and the uterus by an ovarian ligament called
a) Fallopian tube b) Mesovarium
c) Fimbriae d) Tunica albuginea
5.Whi h all layer of U us exhibits strong ontractions d ing part ition.
a) E domet ium b) My metrium
c) Mesovar m d) Del id musc
Wh h glan s ho olo ous o t bu our hral nds o the male
a) Mammary gland b) Oil gland
c) Bartholin’s glands d) None of these.
Which stage of meiotic division, the primary Oocytes are temporarily arrested,
a) Meiotic division-I, Prophase-I b) Meiotic division-II, Prophase-I
c) Meiotic division-I, Metaphase-I d) Meiotic division-II, Metaphase-I
The hormone enhances the production of “Androgen Binding Protein” and helps in the process of
Spermiogenesis.
a) LH b) FSH
c) Testosterone d) TSH
A fluid filled space, the antrum develops in the follicle, and gets transformed into –
a) Tertiary follicle b) Sperm cell
c) Primary follicle d) Sertoli cells
The formation of fertilization membrane
a) Follicular cells b) Acrosome
c) Corpus luteum d) Cortical granules
T .
Part – B
II.Very Short Answer.
What is Gametogenesis?
What is cryptorchism?
What is inhibin? Mention its functions.
What are the accessory glands of the male reproductive system?
Write the components of Semen.
Part – C
III. Short Answer.
How the scrotum acts as a thermoregulator?
Write the components of seminal plasma?
Describe the acrosomal reaction.
Part – D
IV.Write in detail.
Describe male reproductive system.
Exp in about mamma gland.
Exp in the ruc re o pe m cel w h di ram
Des ibe the truc re um.
REPRODUCTIVE HEALTH
Part – A
I.One Mark Questions
A contraceptive pills prevents ovulation by:
a) Blocking fallopian tube
b) Stimulating release of FSH & LH
c) Inhibiting release of FSH & LH
d) Causing immediate degeneration of released ovum
Match the Column-I with Column-II and select the correct option from the codes given
below:
Column-I Column-II
A Copper releasing IUD i LNG-20
B Hormone releasing IUD ii Lippe sloop IUD
C Non-medicated IUD iii Saheli
D Minimum-pills iv Multiload-375
a) A(iv), B(ii) C(i) D (iii) b) A(iv), B(i), iii) D (ii)
c) A(i), B v), C ii) D iii) d) A( v), B(i), (i (ii
Sele t the i corr t a ion of h m nal ontra eptive pill fro the low g
a) Inhibition of ovulation
b) Inhibition of spermatogenesis
c) Changes in cervical mucus impairing its ability to allow passage and transport of
sperms
d) Alternation in uterine endometrium to make it unsuitable for implantation
Assertion: LNG-20 are often called as hormone releasing intrauterine systems (IUS)
Reason: They increase the viscosity of cervical mucus and thereby prevent sperms from
entering the cervix
a) „A‟ is true, „R‟ is false
b) Both „A‟ and „R‟ are true, „R‟ is the correct explanation of „A‟
c) „A‟ is false, „R‟ is true
d) Both „A‟ and „R‟ are true, but „R‟ is not the correct explanation of „A‟
Which of the following is not a step in IVF treatment?
a) Testes stimulation b) Ovarian stimulation
c) Egg retrieval d) Fertilization and embryo culture
The family planning programme was initiated by India in
a) 1951 b) 1953
c) 1963 d) 1972
_ are the ideal contraceptives for female who want to delay pregnancy
a) Oral contraceptive pills b) Intrauterine Devices
i
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