The process of uniting male and female gametes for the commencement of the development of a new offspring is known as fertilization. Sexual reproduction is when fertilization occurs followed by the phases of development of new individuals. Depending upon the method of birth, fertilization can either be internal or external.
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1. Sperm lysin, the enzymatic substance produced by sperms in mammals is known as
(a) cryanogamone
(b) hyaluronic acid
(c) androgamone
(d) hyaluronidase
Answer: (d)
2. Egg development without fertilization is known as
(a) Parthenogenesis
(b) Metagenesis
(c) Gametogenesis
(d) Oogenesis
Answer: (a)
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3. After a sperm has penetrated an ovum in the process of fertilization, entry of further sperms is prevented by
(a) condensation of yolk
(b) development of the vitelline membrane
(c) formation of the fertilization membrane
(d) development of the pigment coat
Answer: (c)
4. In the process of fertilization, this is true
(a) the entry of sperm activates the egg for completing meiosis
(b) only one sperm reaches the egg and enters it
(c) only the acrosome of the sperm enters the egg
(d) two haploid nuclei fuse and immediately divide to produce two nuclei, which are again haploid
Answer: (a)
5. In rabbits, humans and other placental mammals, fertilization occurs in
(a) vagina
(b) ovary
(c) fallopian tubes
(d) uterus
Answer: (c)
6. In female mammals, Bartholin’s glands open into the
(a) Fallopian tubes and release a secretion which makes sperms motile
(b) uterus and release a lubricating fluid during the birth of young ones
(c) vestibule and release a lubricating fluid in the vagina
(d) urinary bladder and assist in release of urine
Answer: (c)
7. This is a minute cell which separates from the animal egg during maturation is known as
(a) Primary oogonia
(b) secondary oogonia
(c) primary spermatogonia
(d) polar bodies
Answer: (d)
8. The nutritive medium for the ejaculated sperms is given by
(a) fallopian tube
(b) uterine lining
(c) seminal fluid
(d) vaginal fluid
Answer: (c)
9. This helps in the penetration of the egg by the sperm
(a) fertilization membrane
(b) antifertilizin
(c) sperm lysin
(d) fertilizin
Answer: (c)
10. In a man, sperms move after ejaculation at a rate of nearly
(a) 2 to 4 inches/minute
(b) 2 to 4 mm/minute
(c) 2 to 4 cm/minute
(d) 2 to 4 feet/minute
Answer: (b)
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