Reproduction & Development in Animals MCQs Part I

1) The branch of zoology that deals with the study of ageing is
a) Anthropology
b) Gerontology
c) Pathology
d) Ethology

2) Which of the following animal larvae is capable of reproducing?
a) Frog
b) Toad
c) American salamander
d) Blind Salamander of Europe

3) The clinical death of man is indicated by
a) Absence of pulse
b) Dilation of pupils
c) Absence of heart beat
d) All the above

4) An insect which sleeps for most of its life is the
a) Mayfly
b) Cicada
c) Stone fly
d) Dragon fly

5) The sex of the developing foetus can be determined by
a) Amniocentesis
b) Fractionation
c) Electron microscopy
d) None of the above

6) The longest sleep for any animal is that of the
a) Polar Bear
b) Antarctic Tern
c) Cicada
d) Tortoise

7) Bacterial activity is minimum at
a) Moderate temperature
b) Moderately high temperature
c) Low temperature
d) High temperature

8) Bacteria cannot survive in highly salted pickles because
a) They are plasmolysed and are consequently killed
b) The pickle does not contain nutrients necessary for bacteria to live
c) Salt inhibits reproduction
d) Bacteria do not get enough light for reproduction

9) Bacteria commonly reproduce vegetatively by
a) Binary fission
b) Conjugation
c) Oidia
d) Budding

10) The asexual reproductive structure in bacteria is known as
a) Akinete
b) Exospore
c) Endospore
d) Heterocyst

11) A bacterial cell divides once every minute and takes one hour to fill
a cup. How much time will it take to fill half the cup?

a) 60 minutes
b) 29 minutes
c) 59 minutes
d) 30 minutes

12) The resting spores produced by bacteria during unfavourable conditions are

a) Oidia
b) Endospores
c) Exospores
d) Chlamydospores

13) Which of the following is the most resistant stage in bacteria?
a) Endospore
b) Conidia
c) Gonidia
d) Oidia

14) Some bacteria are not easily killed because of
a) Tolerant power
b) Chitinous wall
c) Endospore formation
d) Capsule

15) The number of endospores formed per cell in bacteria is typically
a) One
b) Two
c) Three
d) Four

16) In bacteria, sex is determined by
a) Presence of pili
b) Presence of flagella
c) Presence of mesosomes
d) Presence of episomes

17) Who discovered transformation in Diplococcus by a cell-free extract
of heat-killed transform?

a) Frobischer
b) Brown
c) Griffith
d) McLeod

18) Transformation experiments using Pneumococcus bacteria led to the
hypothesis that

a) RNA is the transfer link between DNA and protein synthesis
b) Chromosomes are made up of DNA
c) DNA is the genetic substance
d) Bacteria have sexual reproduction

19) The process of transfer of genetic material (DNA) of one bacterium (donor)
to the other bacteria with the help of a bacteriophage is called

a) Translation
b) Transduction
c) Transcription
d) Transformation

20) Who discovered transduction in bacteria?
a) Wollman and Jacob
b) Zinder and Lederberg
c) Lederberg and Tatum
d) Herelle and Twort

21) Transduction in bacteria is mediated by
a) Cosmids
b) F factors
c) Phage vectors
d) Plasmid vectors

22) Who discovered conjugation in bacteria?
a) Lederberg and Tatum
b) Griffith
c) Jacob and Wollman
d) Zinder and Lederberg

23) Bacterial conjugation involves
a) Only a partial transfer of genetic material from one conjugant to the other
b) A partial but mutual exchange of genetic material between the conjugants
c) A mutual and complete exchange of genetic material between two conjugants
d) Complete transfer of genetic material from on conjugant to other

24) Sex in bacteria was first detected by
a) Koch
b) Pasteur
c) Pasteur
d) Lederberg and Tatum

25) There is no alternation of generations in Escherichia coli because
there is

a) No syngamy
b) No reduction division
c) No conjugation
d) None of these

26) In E. coli, sexual reproduction occurs by
a) Isogamy
b) Anisogamy
c) Oogamy
d) Conjugation

27) The veliger larva is a modified
a) Redia larva
b) Trochophore larva
c) Sporocyst larva
d) Planula larva

28) Cryptorchidism is the condition when the
a) testes are inside the abdomen and normal
b) testes fail to descend through the gubernaculum
c) ovaries are in the gubernaculum
d) ovaries fail to descend

29) The egg released by the Graafian follicle is surrounded by the
a) zona pellucida
b) vitelline membrane
c) plasma membrane
d) all above

30) During a
lifetime she produces about

a) 400 eggs
b) 4000 eggs
c) 365 eggs
d) 40 eggs

31) Leydig cells secrete
a) testosterone
b) progesterone
c) oestrogen
d) corticosterone

32) Cells of Leydig are found in the
a) rabbit kidney
b) frog kidney
c) frog testis
d) rabbit testis

33) Spermathecal pores in Pheretima open at
b) 7, 8, 9, 10
c) 6, 7, 8, 9
d) 8, 9, 10, 11

canal is found in

a) Amoeba
b) Paramecium
c) Fasciola
d) Hydra

35) Sertoli cells are involved in the
a) nutrition of sperms
b) excretion
c) respiration
d) all of these

36) The colleterial gland is found in the
a) male cockroach
b) female cockroach
c) both
d) none of these

37) Which of the following has a haploid set of chromosomes?
a) Oogonia
b) Primary oocyte
c) Secondary oocyte
d) Primary spermatocyte

38) Which one of the following cells, found in the testes of rabbits, secretes
the male hormone?

b) Sertoli cells
c) Epithelial cells
d) Spermatocytes

39) The first step in reproduction at the cellular level is
a) formation of special sex cells
b) cell division
c) rapid increase in cell volume
d) constriction of cytoplasm

40) Azoospermia means
a) a gynaecological problem
b) childlessness
c) cessation of menstruation
d) the absence of sperm in semen

41) In human beings, sperms become motile in the
a) seminiferous tubules
b) vas deferens
c) epididymis
d) only in seminal vesicle

42) The function of spermatheca in the earthworm is
a) sperm maturation
b) collection of sperms of the same animal
c) collection of sperms of other earthworms
d) fertilization

43) Which of the following cells present in the mammalian testes helps
to nourish sperms?

a) Leydig cells
b) Oxyntic cells
c) Interstitial cells
d) Sertoli cells

44) In the fertile human female, on approximately which day of the menstrual
cycle does ovulation take place?

a) day 1
b) day 8
c) day 14
d) day 18

45) In a 28 day human ovarian cycle, the ovulation takes place typically

a) day 1 of the cycle
b) day 5 of the cycle
c) day 12 of the cycle
d) day 28 of the cycle

46) In most mammals, the testes are located in a scrotal sac for
a) sex differentiation
b) spermatogenesis
c) providing more space to the visceral organs
d) independent functioning of kidney

47) A non-flagellated sperm is characteristic of
a) toad fish
b) ascaris
c) liver fluke
d) plasmodium

48) Which has the smallest egg among the vertebrates?
a) Shark
b) Frog
c) Mammal
d) Bird

49) Copper-T prevents
a) implantation
b) attachment of fertilized ovum
c) fertilization
d) all above

50) A human female reaches menopause around the age of
a) 70 years
b) 25 years
c) 15 years
d) 50 years

51) The estrous cycle is a characteristic of
a) human males only
b) mammalian males other than primates
c) human females only
d) mammalian females other than primates

52) The sexually reproducing phase of Obelia is the
a) polyp phase
b) medusa phase
c) planula
d) none of the above

53) The corpus luteum is developed from the
a) oocyte
b) nephrostome
c) Graafian follicle
d) None of these

54) Sexual dimosphism in Ascaris can be justified on the basis of the
a) penial setae
b) postanal phasmids
c) buccal margins
d) body colour

55) Which of the following cell types is capable of giving rise to other cell types in sponges?
a) Pinococytes
b) Thesocytes
c) Archaeocytes
d) Collencytes

56) The major part of semen is the secretion of the
b) Perenial gland
c) Prostate gland
d) Seminiferous tubules

57) The mammalian corpus luteum produces
a) estrogen
b) progesterone
c) both a and b
d) luteinizing hormone

58) In a copulating pair of earthworms, which of the following two
processes take place?

a) External fertilization and internal fertilization
b) Internal fertilization and cross fertilization
c) Cross fertilization and reciprocal fertilization
d) Reciprocal fertilization and internal fertilization

59) Which part of a sperm enters into an ovum during fertilization?
a) head only
b) Tail and middle piece only
c) Whole of it
d) Head and middle piece only

60) In male mammals the testes are located in the
a) extended abdominal cavity
b) thoracic cavity
c) pneumatic cavity
d) pericardial cavity

61) Binary fission is a form of
a) asexual reproduction
b) reduction of chromosomes
c) fusion of chromosomes
d) breaking of nucleus

62) In the female cockroach, the ootheca is secreted by the
a) oothecal chamber
b) common oviduct
c) collateral gland
d) parenial gland

63) Isogametes have the same
a) physiology
b) morphology
c) genetics
d) origin

64) The outermost covering of the testes is the
a) tunica albuginea
b) corona radiata
c) tunica propria
d) tunica membrane

65) Which of the following can be traced in the human testis?
a) Leydig cells
b) Sertoli cells
c) Interstitial cells
d) All above

66) The period in which there is physiological cessation of menstrual flow and consequently the end of the child bearing period is referred to as the
a) amenorrhoea
b) female sterility
c) female climacteric
d) menstrual cycle

67) The corpus spongiosum is part of the
a) ovary
b) testis
c) uterus
d) male copulatory organ

68) Reproductive cells in sponges are
a) Pinocytes
b) Porocytes
c) Thecocytes
d) Archaeocytes

69) The eggs of one of these can develop parthenogenetically by chemicals:
a) man
b) frogs
c) sea urchins
d) all the above

70) Which one of the following is concerned with asexual reproduction?
a) Zygote
b) Spores
c) Gametes
d) Gonads

71) Which type of reproduction of hydra is most common?
a) Budding
b) Cracking
c) Sexual reproduction
d) Gametogenesis

72) The most fundamental characteristic of a living being:
a) Movement
b) Growth
c) Fragmentation
d) Reproduction

73) Fusion of gametes is known as
a) Karyogamy
b) Amphimixis
c) Syngamy
d) Hemixis

74) Secondary sexual characters in females are due to
a) Estrogens
b) Androgens
c) Cholecystokinin
d) Destrogen

75) Which of the following is an accessory sex character?
a) Ovary
b) Penis
c) Vagina
d) Beard

76) Animals which show viviparity include
a) running birds
b) turtles
c) bony fishes
d) whales

77) The development of the egg without fertilization is called
a) Parthenogenesis
b) Gametogenesis
c) Metagenesis
d) Oogenesis

78) Gonads are derived from
a) Ectoderm
b) Endoderm
c) Mesoderm
d) None

79) Mesorchium refers to
a) the capsule in the testis of a frog
b) the capsule in the ovary of a rabbit
c) a peritoneal fold that connects testis and kidney in frogs
d) a peritoneal fold that connects ovary and kidney in frogs

80) The scrotal sacs of man and rabbit are connected with the abdominal cavity by the
a) Spermatic canal
b) Inguinal canal
c) Vagina canal
d) Haversian canal

81) Supporting cells found in between the germinal epithelium of the testis are called
a) Interstitial cells of Leydig
b) Sertoli cells
c) Granular cells
d) Phagocytes

82) Abdominal testes are found in the
a) Elephant
b) Monkey
c) Cat
d) Horse

83) Rete testes open to the
b) Vasa efferentia
c) Urethra
d) Cauda epididymis

84) Sperms are temporarily stored in the
a) Prostate
b) Epididymis
c) Seminal vesicle
d) All of these

85) If the vasa deferentia of a man are surgically cut or blocked
a) sperm in the semen become nonmotile
b) spermatogenesis will not take place
c) testosterone will disappear from blood
d) semen will be without sperms after some time

86) The duct which carries sperms from the testis and epididymis to the penis is the
a) Vasa efferentia
b) Vas deferens
c) Ureter
d) Seminiferous tubule

87) Seminal fluid has a pH of about
a) 6.0
b) 7.4
c) 8.5
d) 9.0

88) Seminal fluid contains
a) Fructose
b) Citrate
c) Ascorbic acid
d) All of these

89) The common duct formed by the union of the vas deferens and the duct from the seminal vesicle is the
a) Urethra
b) Spermatic duct
c) Ejaculatory duct
d) Mullerian duct

90) How many sperms cells are present in an average (3 cc) ejaculation?
a) 50 million
b) 300 million
c) 400 million
d) 500 million

91) The skin covering the glans penis is called the
a) Corpus spongiosum
b) Corpora cavernosa
c) Epididymis
d) Prepuce

92) Which one of the following is out of place?
a) Oviduct
b) Ureter
c) Uterus
d) Vagina

93) Corpus luteum in mammals occurs in the
a) skin and acts as a pain receptor
b) heart and initiates atrial contraction
c) ovaries and produces progesterone
d) brain and connects the two cerebral hemisphere

94) The structure that develops at the site of release of the ovum from the mammalian ovary during embryonic development is the
a) corpus callosum
b) corpus albicans
c) corpus mammalian
d) corpus tectum

95) The mitochondria of a sperm occur in its
a) Head
b) Middle piece
c) Tail
d) Whole of it

96) The enzyme hyaluronidase is synthesized in the
a) Lysosome of the acrosome
b) Golgi bodies of the acrosome
c) Head of the sperm
d) Tail of the sperm

97) Tail-less sperms occur in the
a) Frog
b) Ascaris
c) Amphioxus
d) Rabbit

98) The products of the first maturation division of germ cell in the testis
are known as

a) Spermatids
b) Oocytes
c) Secondary spermatocytes
d) Sperms

99) The change in a mammalian sperm which prepares it to fertilize the
ovum is termed

a) Metamorphosis
b) Capacitation
c) Maturation
d) Preparation

100) How many centrioles are normally found in a sperm?
a) One
b) Two
c) Many
d) None


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