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Reproduction in Organisms Class 12 MCQs Questions with Answers
Multiple Choice Type Questions
Question 1.
After ovulation, the ruptured Graafian follicle changes into
(a) Corpus striatum
(b) Corpus iuteum
(c) Corpus albicans
(d) Corpus callosum
Answer
Answer: (b) Corpus iuteum
Question 2.
Source of testosterone hormone are
(a) Setoli cells
(b) Acinal cells
(c) Lutein cells
(d) Leydig cells
Answer
Answer: (d) Leydig cells
Question 3.
Endometrium is the lining of
(a) Vagina
(b) Uterus
(c) Fallopian
(d) Ovary
Answer
Answer: (b) Uterus
Question 4.
The degenerative process by which eggs are lost from the ovary is called
(a) Hypoplasia
(b) Regression
(c) Atresia
(d) Hyperplasia
Answer
Answer: (c) Atresia
Question 5.
The ovum released from the ovary is received by
(a) Uterus
(b) Vagina
(c) Isthmus
(d) Ostium
Answer
Answer: (d) Ostium
Question 6.
The sperm forming tubules of testes are
(a) Crypts
(b) Nephric tubules
(c) Rete testis
(d) Interstitial cells
Answer
Answer: (a) Crypts
Question 7.
Which of the following is not associated with the human male?
(a) Prostrate gland
(b) Perineal gland
(c) Cowper’s glands
(d) Seminal vesicles
Answer
Answer: (b) Perineal gland
Question 8.
Menopause in female comes at the age of
(a) 30 to 40 years
(b) 45-55 years
(c) 55 to 60 years
(d) After 60 years
Answer
Answer: (b) 45-55 years
Question 9.
Mammalian follicle was first discovered by
(a) De Graf
(b) Spallangani
(c) Von Bear
(d) Leeuwenhoek
Answer
Answer: (a) De Graf
Question 10.
Nebenkern represents
(a) Mitochondrial spiral of sperm
(b) Acrosome of sperm
(c) Centiples of sperm
(d) Tail of sperm
Answer
Answer: (a) Mitochondrial spiral of sperm
Question 11.
Sperm entry in the ovum is assisted by
(a) Hyaluronidase
(b) Hyaluronic acid
(c) Fertilizin
(d) Antifertilizin
Answer
Answer: (a) Hyaluronidase
Question 12.
Failure of testes to descend into the scotum is called
(a) Paedogenesis
(b) Cryptorchidism
(c) Castration
(d) Gynaecomastia
Answer
Answer: (b) Cryptorchidism
Question 13.
Fusion of male and female gametes is called
(a) Polygamy
(b) Amphimixis
(c) Ejaculation
(d) Syngamy
Answer
Answer: (d) Syngamy
Question 14.
The cavity present in the Graafian follicle is
(a) Amniotic cavity
(b) Archenteron
(c) Antrum
(d) Ostium
Answer
Answer: (c) Antrum
Question 15.
The spermiogenesis is the process by which spermatozoa are formed from
(a) Spermatogonia
(b) Spermatid
(c) Primary.spermatocyte.
(d) Secondary spermatocyte
Answer
Answer: (b) Spermatid
Fill in the Blanks
Question 1.
Internal budding is reported in ………………… and internal buds are called …………………
Answer
Answer: spongilla, gemmules
Question 2.
Cavity of scrotum is called ………………… in which testis lies.
Answer
Answer: vaginal coelone
Question 3.
Transformation of a young follicle into Graafian follicle is controlled by …………………
Answer
Answer: follicular stimulating hormone
Question 4.
Corpus luteum secretes while Leyslig’s cells secrete …………………
Answer
Answer: progesterone, testosterone
Question 5.
Parthenogenetically developed individual in the colony of honey bee are …………………
Answer
Answer: drones
Question 6
………………… is method of permanent fertility control in man.
Answer
Answer: Vasectomy
Question 7.
A secondary oocyte has a ………………… chromosome number while a fertilized ovum has a ………………… chromosome number
Answer
Answer: haploid, diploid
Question 8.
The mesentery which suspends the ovary is called …………………
Answer
Answer: mesovarium
Question 9.
Period taken for one complete menstrual cycle is of ………………… days.
Answer
Answer: 28
Question 10.
The transformation of spermatid into the sperm is called …………………
Answer
Answer: spermiogenesis.
True/False Questions
Question 1.
Enlargement of breasts depends upon the lactogenic hormone only.
Answer
Answer: False
Question 2.
Testes are primary sex organs of male while ovaries and breasts are primary sex organs of female.
Answer
Answer: False
Question 3.
The process of reproduction is essential for the maintenance of the species and not for the survival of the organisms.
Answer
Answer: True
Question 4.
Spermatogenesis is a continuous process while oogenesis is a discontinuous process.
Answer
Answer: True
Question 5.
First half of menstrul cycle is controlled by progesterone while second half of it is controlled by estrogens.
Answer
Answer: False
Question 6.
Typhline is an Indian snake showing parthenogenesis.
Answer
Answer: True
Question 7.
Human seminal fluid is acidic in nature.
Answer
Answer: False
Question 8.
Amoeba is immortal.
Answer
Answer: True
Question 9.
Sexual reproduction always involves the fusion of gametes of male and female parents.
Answer
Answer: False
Question 10.
Paedogenesis is a method of sexual reproduction in the larval stage.
Answer
Answer: True
One Word Type Questions
Question 1.
Name three phases of gametogenesis.
Answer
Answer: Multiplicative, growth and maturation phase
Question 2.
Name accessory reproductive glands of males.
Answer
Answer: Prostrate, seminal vesicles and cowper’s glands
Question 3.
Name any unisexual organism.
Answer
Answer: Cockrdach
Question 4.
Acrosome is associated with golgi body. What is the middle piece associated with?
Answer
Answer: Mitochondria
Question 5.
Term the condition of failure of testes to descend into scrotal sacs.
Answer
Answer: Sterility
Question 6.
Who is the father of Embrology?
Answer
Answer: Aristotle
Question 7.
Name the first cloned sheep produced in the world.
Answer
Answer: Dolly
Question 8.
Give the term for frequent urination at night.
Answer
Answer: Nocturia
Question 9.
Absence or near absence of sperms in semen is called?
Answer
Answer: Azoospermia
Question 10.
What is asexual reproduction in which the parent divides into many daughters?
Answer
Answer: Multiple fission.
Match the Following
| Column A | Column B |
| 1. Parthenogenesis | A. Golgi body |
| 2. Prolactin | B. Progesterone |
| 3. Acrosome | C. Apis |
| 4. Secretory phase | D. Corpus luteum |
| 5. Progesterone | E. Mammary, glands |
Answer
Answer:
| Column A | Column B |
| 1. Parthenogenesis | C. Apis |
| 2. Prolactin | E. Mammary, glands |
| 3. Acrosome | A. Golgi body |
| 4. Secretory phase | B. Progesterone |
| 5. Progesterone | D. Corpus luteum |
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