1. The maximum contribution to semen is made by
a. Seminal
vesicles
b. Bulbourethral
gland
c. Prostate gland
d. Testes
Correct answer: a, The maximum contribution to the semen is made by
seminal vesicles. The seminal vesicles produce a yellowish viscous fluid rich
in fructose and other substances that makes up about 70% of human semen.
2. Second meiotic division during spermatogenesis leads to the
formation of
a. Spermatozoa
b. Spermatids
c. Secondary
spermatocytes
d. Primary
spermatocytes
Correct Answer: b, During spermatogenesis, Meiosis II leads to the
formation of four spermatids from secondary spermatocytes.
3. Stereocilia in epididymis help in
a. Secreting
prostaglandins
b. Propelling
sperms
c. Absorbing
excess fluid
d. Both secreting
prostaglandins and propelling sperms
Correct answer: c, Stereocilia help the lining of the epididymis to
absorb excess fluids from the hollow lumen of the epididymis, along with dead
or defective sperm.
4. The structure unique to the tertiary follicle is
a. Follicular
epithelium
b. Stratum
granulosum
c. Pellucid zone
d. Antral
follicle
Correct Answer: d, The structure unique to the tertiary follicle is a
fluid-filled cavity, the antral follicle. This is also used as an identifying
feature of the tertiary follicle.
5. In which of the following anatomical structures are ciliated
epithelium most numerous?
a. Ampulla and
Infundibulum of the fallopian tube
b. Infundibulum
and fimbriae of the fallopian tube
c. Fimbriae and
Ampulla of the fallopian tube
d. Isthmus and
Ampulla of the fallopian tube
Correct answer: a, Ciliated cells predominate throughout the Fallopian
tube, but are most numerous in the Infundibulum and Ampulla.
6. If the vas deferens of a man is surgically blocked,
a. Sperm will be
non-motile
b. Sperm will be
without mitochondria
c. Semen will be
without sperm
d. Semen will not
contain fructose
Correct answer: c, Vas deferens transports sperm from the epididymis
to the ejaculatory ducts in anticipation of ejaculation. Thus, if vas deferens
is blocked, the semen will be without sperm.
7. Gubernaculum is the connective tissue that attaches
a. Cauda
epididymis to the scrotal sac
b. Caput
epididymis to the scrotal sac
c. Cauda
epididymis to Vas deferens
d. Seminiferous
tubules to rete testes
Correct answer: a, The cauda epididymis is attached to the scrotal sac
by a connective tissue called gubernaculum.
8. The layer covering the outer surface of the uterus
a. Consists of
smooth muscle
b. Is a serous
layer
c. Bears
commensal organisms
d. Is sloughed
during the estrous cycle
Correct Answer: b, the layer covering the outer surface of the uterus is the perimetrium, which is the serous layer of the uterus. It secretes a serous fluid.
9. Changes occurring in the uterus during the post-menstrual phase
are governed by
a. Luteinizing
hormone
b. Progesterone
c. Estrogen
d. Follicle-stimulating hormone
10. In oogenesis, an increase in the size of the oocyte nucleus is
immediately followed after
a. Synthesis of
yolk
b. Gene
amplification
c. An increase in
the size of the oocyte
d. Formation of
Vitelline membrane
Correct Answer: d, Due to an increase in the amount of DNA, nuclear
sap and nucleus increase in size after a thin vitelline membrane is formed around
the oocyte.
11. Zona pellucida is a membrane of an egg. It is the
a. Primary egg
membrane in fishes
b. Primary egg
membrane in mammals
c. Primary egg
membrane in birds
d. Secondary egg membrane in insects
Correct Answer: b, Zona pellucida is the primary egg membrane in
mammals. It is a glycoprotein layer surrounding the plasma membrane of
mammalian oocytes. It is a vital constitutive part of the oocyte
12. During organogenesis, pineal glands develop from a layer which
also gives rise to
a. Thymus b. Thyroid
c. Spleen d. Rectum
Correct Answer: d, Pineal glands develop from
ectoderm, which also gives rise to the rectum.
13. During the gestation period, the end of twenty weeks of the fetus
is characterized by
a. Formation of
blood cells by bone marrow
b. Formation of
skeleton
c. Initiation of
heartbeat
d. Formation of the hair on the body
Correct answer: d, Hairs are formed on the body and head of the fetus
by the end of twenty weeks. At this time, the baby is covered with fine,
feathery hair called lanugo and a waxy protective coating called vernix.
14. Greater vestibular glands in females are homologous to which of
the following in males?
a. Prostate gland
b. Bulbourethral
gland
c. Seminal
vesicles
d. Prostatic
utricle
Correct answer: b, Bulbourethral gland, also called a Cowper's gland,
is one of two small exocrine glands in the reproductive system of many males
mammals. They are homologous to greater vestibular glands, i.e. Bartholin's
glands in females.
15. With regard to the reproductive anatomy, which of the following
sentences are false?
a. Sertoli cells
provide nourishment to the developing sperm
b. Spermatic cord
has a rich supply of arteries and veins
c. In winters, Dartos
muscle retract scrotum towards the body
d.Peristaltic
movements take place in the seminiferous tubules
Correct answer: In winters, cremaster
muscles retract the scrotum towards the body. Dartos muscles work
antagonistically to cremaster muscles.
16. Which of the following sentences is false regarding asexual
reproduction?
a. The whole cell
acts as reproductive units in protists and monerans.
b. Budding is
seen only in unicellular organisms.
c. Zoospores are
flagellated reproductive structures
d. Vegetative
reproduction is a type of asexual reproduction.
Correct Answer: b, Budding is a form of asexual reproduction which is
also seen in multi-cellular organisms like the hydra.
17. Which of the following spores are released through ostiole, a
small opening at the apex?
a. Zoospores
b. Acervuli
c. Pycnidia
d. Gemmules
Correct answer: c, Pycnidia spores are
released through a small opening at the apex, the ostiole.
18. Zoospores, which are characteristic of oomycota (fungus-like
eukaryotic organism), are
a. Zoospores with
a single anterior flagellum
b. Anisokont
c. Opisthokont
d. Heterokont
Correct Answer: d, Heterokont are biflagellate zoospores with both
whiplash and tinsel-type flagella attached anteriorly or laterally. These
zoospores are characteristic of Oomycota.
19. Slips for vegetative reproduction are found in
a. Tapioca
b. Murraya sps
c. Guava
d. Lebbeck
Correct answer: a, Slips are buds on tuberous adventitious roots which
produce shoot above the ground and adventitious roots below and thus, produce a
new plant. These are found in Tapioca.
20. Centrioles are absent in the sperm of
a. Bombyx mori
b. Drosophila
melanogaster
c. Mice
d. Humans
Correct answer: In sperm of mice,
centrioles are absent.
21. Metacystic trophozoites are formed during the life cycle of
a. Paramecium
b. Hydra
c. Euglena
d. Entamoeba
Correct Answer: d, Metacystic trophozoite is the motile, feeding, and
pathogenic stage of E. histolytica. It is a stage in the amoeba life cycle in
which the nucleus of amoeba undergoes division to form 8 nuclei which are
followed by the cytoplasm fission. As a result, 8 small amoebas or amoebulae
are formed. These are known as metacystic trophozoites.
22. Hormogonia is a method of vegetative reproduction seen in
a. Blue-green
algae
b. Fucus
c. Euglena
d. Chara
Correct answer: a, Hormogonia method of vegetative reproduction is
found in blue-green algae. The trichomes of blue-green algae break up within
the sheath into many-celled segments called hormogonia or hormogones.
23. Seasonal breeding in some animals is controlled by
a. Pituitary
gland
b. Hypothalamus
c. Pineal gland
d. Gonads
Correct Answer: b, The hypothalamus controls seasonal breeding in
animals. It is considered to be the central control for reproduction due to its
role in hormone regulation. It produces a gonadotropin-releasing hormone that stimulates other glands to carry out the reproductive process.
24. During the anestrus phase of the estrus cycle,
a. Ovarian
follicles mature b. Progesterone
is produced
c. The cycle
rests d.
Endometrium starts to develop
Correct answer: c, Anestrus refers to the phase when the sexual cycle
rests.
25. In the placenta of guinea pigs,
a. There are 3
barriers between the mother’s blood and fetal blood
b. There are 3
barriers between the mother’s blood and fetal blood
c. There are 6
barriers between the mother’s blood and fetal blood
d. There is no
barrier between the mother’s blood and fetal blood
Correct answer: b, In Guinea pigs, haemoendothelial placenta is
present with 2 barriers between the mother's blood and fetal blood. The chronic
villi lose their epithelial and mesenchymal layers and the endothelial lining
of the blood vessels is the only barrier.
26. In multi-nucleate protozoa like Opalina, during asexual
reproduction
a. Only nucleus
divides but cytoplasm does not
b. Only cytoplasm
divides but the nucleus does not
c. Both cytoplasm
and nucleus divides simultaneously
d. Cytoplasm
divides and the spores are formed
Correct answer: b, In Opalina, during asexual reproduction, only the cytoplasm divides but the nuclei do not. This type of asexual reproduction is
termed plasmotomy. Later, each daughter cell regains the normal number of nuclei
by nuclear division.
27. The common mode of asexual reproduction seen in Ephelora
(protozoan), Sycon (sponge), Planaria (flatworm), Eusyllis (annelid) and
Botryllus (tunicate) is
a. Fragmentation b. Oozoid formation
c. Regeneration d. Budding
Correct Answer: d, Budding occurs in Ephelora (protozoan), Sycon (sponge),
Planaria (flatworm), Eusyllis (annelid), and Botryllus (tunicate). In the
process of budding, small outgrowths from the body of the animal come out known
as buds. Buds develop into new individuals.
28. Choose the correct
sentences from the following with respect to external fertilization:
a. Water acts as an essential medium for external fertilization.
b. Male and female gametes are released at the same time.
c. External fertilization is successful with few gametes.
d. Externally fertilized eggs have
better chances of survival.
a. a and b b. a
and c
c. a,b, and c d. b
and d
Correct answer: a, External fertilization
occurs in water or a moist area because it gives the sperm external mobility to
get to the egg. In external fertilization, the sperm and ova can shed
simultaneously to fertilize the egg.
29. Which of the following
sentences are false?
a. Organisms habitat is one of the factors on which the
type of reproduction depends
b.Dioceous organisms are seen only in animals
c. Clones are never obtained in sexual reproduction
d. Males in bees are haploid
Correct Answer: b, This sentence is false as
dioecious organisms can be seen in both plants and animals. Plants like cannabis
produce both a male plant and a female plant.
30. During cleavage of the fertilized egg, the blastomeres become arranged in a spiral manner around the
animal-vegetal axis in
a. Sponges b.
Echinoderms
c. Annelids d.
Vertebrates
Correct answer: In annelids, the
blastomeres become arranged in a spiral manner around the animal-vegetal axis.
A developing embryo has spiral cleavage if, as it undergoes cleavage and
changes from a four-cell embryo to an eight-cell embryo, the cells divide at
slight angles to one another, so that none of the four cells in one plane of
the eight-cell stage is directly over a cell in the other plane.
31. In females, the organ
whose growth, development, and functioning is regulated by the pituitary gland is
a. Vagina b.
Ovary
c. Uterus d.
Fallopian tube
Correct Answer: b, Ovary is a primary sex
organ. Growth, development, and functioning of primary sex organs are regulated
by the pituitary gland.
32. Tunica vaginalis is a
visceral peritoneal layer that is associated with
a. Ovary b.
Vagina
c. Testes d.
Penis
Correct answer: c, Tunica vaginalis is a layer
of visceral peritoneum found outside tunica albuginea which is a dense fibrous
tissue covering over testes
33. The Leydig cells in
testes play a prominent role in
a. Production of sperms b.
Secretion of the male sex hormone
c. Production of mucus d.
Providing nutrition for developing sperm
Correct Answer: b, Leydig cells secrete male
sex hormone - testosterone, which promotes the development of the accessory
glands and controls male secondary characters.
34. Gubernaculum is the connective tissue that connects the scrotal sac with
a. Cauda epididymis b.
Caput epididymis
c. Corpus epididymis d.
Seminiferous tubules
Correct answer: a, The cauda epididymis is
attached to the scrotal sac by a connective tissue called gubernaculum.
35. Which of the following
characterizes the ampulla of the fallopian tube?
a. Opening into uterus b.
Surrounded by fimbriae
c. Dilated portion d.
Funnel shape
Correct answer: c, Ampulla is the middle
dilated part of the fallopian tube
36. The transverse ridges in
the membranous walls of the vagina are called
a. Labia majora b.
Rugae
c. Labia minora d.
Villi
Correct Answer: b, Rugae are the transverse
ridges on the mucous membrane lining the vagina. They allow the vagina to
stretch during childbirth. Many of the ridges disappear with the atrophy of
menopause.
37. All of the following are
haploid, except
a. Secondary spermatocytes b. Spermatids
c. Spermatozoids d.
Primary spermatocytes
Correct Answer: d, Primary spermatocyte is the
diploid stage of spermatogenesis. They are formed by the mitotic division of
spermatogonia which is diploid in nature
38. In the dictyate stage, the
female gametes are retained as
a. Oogonium b.
Primary oocytes
c. Ootid d.
Secondary oocytes
Correct Answer: b, The dictyate or dictyotene
is a prolonged resting phase in oogenesis. In this stage, the female gametes
are retained as primary oocytes which are formed in the stage of meiotic
prophase I in ootidogenesis.
39. Regeneration of
endometrium through the proliferation of uterine and fallopian tube cells occurs at
a. Follicular phase of the menstrual cycle
b. Menstrual phase of the menstrual cycle
c. Luteal phase of the menstrual cycle
d. Ovulatory phase of the menstrual cycle
Correct answer: a, During the follicular phase,
regeneration of endometrium through the proliferation of uterine and fallopian tube
cells occur and as a result, the endometrium of the uterus becomes considerably
thickened in anticipation of pregnancy.
40. The energy for the
movement of sperms is generated in the
a. Head of the sperm b. The neck of the sperm
c. Tail of the sperm d. The middle piece of the sperm
Correct answer: c, The middle piece of sperm
contains a compact mass of mitochondria which has oxidative enzymes and supplies
energy for the metabolism and movement of sperm.
41. The sixth month of normal
pregnancy is accompanied by
a. Formation of external genitalia b. The appearance of hair on the head
c. Formation of eye-lashes d. Development of limbs
Correct answer: c, By the end of sixth months
of pregnancy, eye-lashes are formed in the foetus.
42. Zinc in the semen is
contributed by
a. Testes b.
Bulbourethral gland
c. Seminal vesicle d.
Prostate gland
Correct Answer: d, Zinc in semen is
contributed by the prostate gland. Zinc stabilizes the DNA-containing chromatin
in the sperm cells
43. Which of the following is
untrue about the menstrual cycle?
a. There is the discharge of blood and mucosal tissue from
the Endometrium
b. On day 1, estrogen and progesterone levels are low
c. A sharp rise in Luteinizing hormone takes place on 12th
-14th day of the cycle
d. If fertilization takes place estrogen and progesterone
levels drops
Correct Answer: d, if the egg is not fertilized,
estrogen and progesterone levels drop and on Day 28, the menses begin.
44. The eggs or ova in humans
contains
a. Meager amount of yolk b.
No yolk
c. Yolk on the vegetal pole d. Yolk in the center of the ova
Correct Answer: b, Eggs in humans are
alecithal, i.e., they do not contain yolk.
45. in human embryonic
development, the process of compaction occurs at
a. Gastrula stage b.
Blastula stage
c. Morula stage
d. 8-celled blastomere stage
Correct answer: c, A morula is an early stage
embryo consisting of around 16 cells in a solid ball contained within the zona
pellucida. At this stage, the cells start to bind firmly together with the
formation of desmosomes and gap junctions, in a process called compaction.
46. Immature form of
Orthoptera is known as
a. Nymph b.
Trout
c. Naiad d.
Instar
Correct answer: a, Nymph is the immature form
of some invertebrates like Orthoptera.
47. Incomplete metamorphosis
is observed in
a. Butterfly b.
Dragonfly
c. Damselfly d. Both
Damselfly and dragonfly
Correct answer: d, Incomplete metamorphosis is
seen in dragonflies and damselflies. They change gradually by undergoing a
series of molts.
48. Which of the following
are the elongated, flattened and active forms of larvae?
a. Eruciform b.
Scarabaeiform
c. Campodeiform d.
Elateriform
Correct answer: c, Campodeiform are elongated,
flattened and active larvae.
49. Hypermetamorphosis can be
seen in which of the following insects?
a. Suborder Asilomorpha of Dipterans b.
Family Nevrorthidae of Neuroptera
c. Family Meloidae
of Coleoptera d.
Order
Siphonaptera
Correct answer: c, Hypermetamorphosis is
observed in the family Meloidae of Coleoptera (beetle). Hypermetamorphosis is
complete insect metamorphosis where some larval instars are distinct from each
other
50. Which of the following
birds use dance as a method of seducing females?
a. Eurasian wren b.
Sparrows
c. Pheasant d.
Cranes
Correct answer: d, Cranes seduce females by
special dancing patterns
51. Which of the following
exhibits a Fisherian runaway mechanism to attract females?
a. Blue foot booby b.
Peacock
c. Zebra finch d.
Spotless starling
Correct answer: b, Peacocks possess a very colorful and elaborate plumage to attract
females. Thus, they exhibit the Fisherian runaway mechanism
52. Cystovarian ovary is
present in
a. Salmonids b.
Lungfish
c. Bowfin d.
Teleost fish
Correct answer: d, Cystovarian ovary is
present in some teleost fishes. Here, the ovary lumen has continuity with the
oviduct.
53. Which of the following
fishes are hermaphrodite?
a. Onchorhynchus sps b.
Carassius auratus
c. California sheephead d.
Heterodontus francisci
Correct answer: c, California sheepheads are
hermaphrodites. They have both testes and ovaries either at different phases in
their life cycle or simultaneously.
54. Intrauterine cannibalism
is observed in which of the following species?
a. Grey nurse shark b.
Angel sharks
c. Shortfin mako d.
Porbeagle
Correct answer: a, The largest embryos eat
their weaker and smaller siblings in intrauterine cannibalism. This behavior is
commonly found among sharks, such as the grey nurse shark.
55. A pair of hemipenes are
found in
a. Turtles b.
Crocodilians
c. Tuataras d.
Snakes
Correct answer: d, Snakes possess a pair of
hemipenes of which only one is used in each mating season. Hemipenes are used
by snakes during copulation.
56. Which of the following in
reptile eggs serve as a reservoir for water and proteins?
a. Allantois b.
Albumin
c. Chorion d.
Amniotic sac
Correct answer: b, The albumin protects the
embryo and serves as a reservoir for water and protein.
57. Phallodeum is an
intromittent organ. It is present in
a. Frogs b.
Lizards
c. Salamanders d.
Caecilians
Correct answer: d, Phallodeum is present in
caecilians. These are used by caecilians for copulation.
58. ________ use love darts
as a form of sexual selection.
a. Reptiles b.
Gastropods
c. Arthropods d.
Cephalopods
Correct answer: b, Gastropods use love darts as a form of sexual selection.
59. Apophallation is seen in
a. Terrestrial slugs b.
Sea snails
c. Sea slugs d.
Newts
Correct answer: a, Apophallation is seen in
terrestrial slugs. In the process of apophallation, the penis is bitten off by
either partner once it is trapped in the body of the partner.
a. Dogs b.
Marsupials
c. Humans d.
Both humans and Marsupials
Correct answer: d, Neither humans nor
marsupials have baculum in their penises. The baculum, or penis bone, is a bone
found in the penis of many placental mammals.
61. Which of the following
organisms reproduce by longitudinal binary fission?
a. Paramecium b.
Euglena
c. Amoeba d.
Planaria
Correct answer: b, Euglena divides only by
longitudinal binary fission.
62. In which organism(s) is sperm
dependent parthenogenesis observed?
a. Pelophylax KI hispanicus (Italian edible frog)
b.
Poeciliopsis (Bony fishes)
c. Schmidtea polychora (planaria) d. Mayfly
Correct answer: c, Sperm dependent
parthenogenesis is observed in planaria schmidtea polychora.
63. In which organisms are
thelytoky is seen?
a. Termite queens b.
Worker honeybees
c. Ants d.
Chalcidoids
Correct answer: b, In honeybees, workers will
undergo thelytoky in the absence of a queen.
a. Elephant b.
Rabbit
c. Bull d.
Sea lion
Correct answer: b, In rabbits, testes come
into scrotal sacs only during breeding season.
65. Which organism uses
merogony form of multiple fission to produce daughter cell?
a. Toxoplasma gondii b.
Plasmodium
c. Cryptosporidium d.
Hydra
Correct answer: b, Plasmodium uses merogomy
form of multiple fission to produce daughter cells.
66. Chlamydomonas reproduce
asexually by producing
a. Gemmules b.
Conidia
c. Zoospores d.
Zygospores
Correct answer: c, Chlamydomonas reproduce
asexually by producing zoospores.
67. Which of the following
organisms reproduces exclusively asexually?
a. Hammerhead shark b.
Aptinothrips genus of glass thrips
c. Timema genus of stick insect d. Bdelloid rotifers
Correct answer: d, Bdelloid rotifers reproduce
exclusively asexually.
68. Which animal divides by the method called fissiparity?
a. Flatworm b.
Coral
c. Echinoderm d.
Coelenterate
Correct answer: c, In echinoderms, the process
of fragmentation is usually known as fissiparity.
69. Which type of fission is
observed in Opalina and pelomyxa?
a. Irregular binary fission b. Fissiparity
c. Plasmotomy d.
Multiple fission
Correct Answer: c, In Opalina and pelomyxa, peculiar binary fission called
plasmotomy occurs.
70. In which organism is buds formed inside the
parental body?
a. Scypha b.
Spongilla
c. Hydra d.
Syllis
Correct Answer: In
Spongilla, the budding is endogenous as several buds are formed inside the
parental body.
71. What are the internal
buds formed in sponges called?
a. Cysts b.
buds
c. Gemmules d.
Conidia
Correct answer: c, The internal buds formed in sponges are called Gemmules.
72. Heterogony is seen in
a. Phasmids b. Aphids
c. Chalcidoids d.
Honeybees
Correct answer: b, Phenomenon of heterogony or
cyclic parthenogenesis is seen in aphids.
73. Which type of asexual
reproduction is seen in monocystis?
a. Binary fission b.
Sporocyst
c. Budding d.
Fragmentation
Correct answer: b, Monocystis reproduce by
spore formation.
74. Which type of asexual
reproduction is observed in starfish?
a. Binary fission b.
Budding
c. Fragmentation d.
Zoospore formation
Correct answer: c, Starfishes reproduce asexually
by fragmentation.
75. Which of the following
is/are developed by the change in environmental conditions in pea aphids?
a. Telescoping generations b. Fundatrices
c. Sexuparae d.
Heterogony
Correct answer: c, In the case of the pea aphid,
the environmental conditions induce the development of sexuparae.
76. Which of the following is
the mode of reproduction in amoeba?
a. Budding b.
Fragmentation
c. Plasmotomy d.
Fission
Correct answer: d, Amoeba reproduces asexually
by fission.
77. Which organism reproduces
by transverse binary fission?
a. Euglena b.
Amoeba
c. Plasmodium d.
Paramecium
Correct answer: d, Paramecium reproduces by
transverse binary fission.
78. Which mode of asexual
reproduction is used by planaria?
a. Longitudinal binary fission b. Multiple fission
c. Transverse binary fission d. Budding
Correct answer: c, Planaria reproduces by
transverse binary fission.
79. Which of the following
processes take place in unfavorable conditions?
a. Transverse binary fission b. Multiple fission
c. Budding d.
Longitudinal binary fission
Correct answer: b, Multiple fission takes
place in unfavorable conditions.
80. In which type of asexual
reproduction does cyst formation take place?
a. Gemmule formation b. Binary fission
c. Sporulation d.
Budding
Correct answer: c, Cyst is the hard protective
covering in which daughter cells are placed in sporulation.
81. How does reproduction
take place in hydra?
a. Fragmentation b.
Binary fission
c. Plasmotomy d.
Budding
Correct answer: d, Hydra reproduces asexually
by budding.
82. In which organism(s) is
gemmule formation is seen?
a. Opalina b.
Freshwater sponges
c. Eusyllis d.
Plasmodium
Correct answer: b, Freshwater sponges
reproduce by gemmule formation.
83. The similarity between
starfish, planaria, tapeworm, hydra, sponges, and spiders is
a. They all exhibit sexual and asexual reproduction
b. They all reproduce by budding c. They all have the power to regenerate
d. They all live in colonies
Correct answer: c, Starfish, tapeworm, hydra,
spider, sponges, and planaria have the power to regenerate.
84. Which type of sexual
reproduction can be observed in paramecium?
a. Exogamy b.
Hologamy
c. Autogamy d.
Pedogamy
Correct answer: c,
Autogamy is observed in paramecium. Autogamy is self-fertilization.
85. In which phenomenon
do the gamete nuclei of the same cell unite together to form a new individual?
a. Parthenogenesis b.
Automixis
c. Plasmotomy d.
Regeneration
Correct answer: Automixis is the phenomenon
in which the gamete nuclei of the same cell unite together to form a new
individual.
86. In which of the following
organisms do sexual reproduction take place by isogametes?
a. Paramecium b.
Rabbit
c. Monocystis d.
Frogs
Correct answer: In monocystis, sexual
reproduction takes place by isogamy.
87. In which method does
synkaryon formation take place?
a. Automixis b.
Syngamy
c. Conjugation d.
Plasmotomy
Correct answer: Synkaryon formation takes
place during conjugation.
88. What is the sequence of larva formation in liver fluke?
a. Metacercaria, cercariae, rediae, sporocyst and miracidium
b. Miracidium, sporocyst, rediae, cercariae and
metacarcaria
c. Sporocyst, miracidium, rediae, cercariae and
metacarcaria
d. Miracidium, sporocyst, rediae, metacercaria and
cercariae
Correct answer: b, The sequence of the larva
formation in liver fluke is Miracidium, sporocyst, rediae, cercariae, and metacercaria
89. Which is the exclusive
mode of reproduction adapted by lizard lacerta Saxicola Americana?
a. Incomplete parthenogenesis b. complete parthenogenesis
c. Syngamy d.
Regeneration
Correct answer: b, Lizard lacerta Saxicola
Americana reproduce exclusively by complete parthenogenesis and only females
are found in nature.
90. Parthenogenesis in the larva
is called
a. Incomplete parthenogenesis b. Pedogamy
c. Paedogenesis d.
Syngenesis
Correct answer: c, When parthenogenesis takes
place in the larva, it is called paedogenesis.
91. The 14th
day of the menstrual cycle is characterized by
a. Ovulation b.
Attachment of egg to the lining of the uterus.
c. Thickening of uterus d.
Fertilization
Correct answer: a, Around Day 14 (in a 28-day cycle), hormones cause
the mature follicle to burst and release an egg from the ovary, a process
called ovulation
a. 9 months b.
22 months
c. 18 months d.
33 months
Correct answer: The
gestation period of an elephant is around 22 months.
93. Telolecithal eggs are
the characteristic of
a. Humans b.
Tunicates
c. Reptiles d.
Insects
Correct answer: c,
Telolecithal eggs contain more quantity of yolk and cytoplasm, yolk is present
on a pole of the egg. This pole is called the vegetal pole and the opposite pole is called the animal pole. These kinds of eggs are found in reptiles.
94. Mullerian duct in
females give rise to
a. Wolffian ducts b.
Ovaries
c. Uterus d.
Ureters
Correct answer: c,
Mullerian ducts are a pair of embryonic ducts parallel to the Wolffian ducts and giving rise in the female to the fallopian tubes, uterus,
cervix, and upper portion of the vagina
95. Embryo is protected from external shocks by virtue of
a. Amnion
membrane b. Allantois
membrane
c. Chorion d.Placenta
Correct answer: a, The amnion is a membrane that closely covers the embryo when first formed. It fills with the amniotic fluid which causes the amnion to expand and become
the amniotic sac which serves to provide a protective
environment for the developing embryo or fetus
96. Middle piece of human sperm contains
a.
Mitochondria & 9+2 arrangement of microtubules
b.
9+2 arrangement of microtubules only
c.
Mitochondria & centrioles
d.
Centrioles + Mitochondria + nucleus
Correct answer: a, The middle piece of human sperm
contains Mitochondria & 9+2 arrangement of microtubules
97. During the menstrual cycle, the formation of the corpus
luteum is favored by:
a.
FSH b.
LH
c.
Estrogen d.
Progesterone
Correct answer: b, LH causes ovulation and
formation of corpus luteum, that is why LH is also called ovulating hormone.
98. Organogenetically, during embryonic
development, pancreas, and liver develops from
a.
Ectoderm b.
Mesoderm
c.
Endoderm d.
Blastopore
Correct answer: c, During embryonic development
pancreas and liver develops from Endoderm
99. Which of the following point is incorrect
about menstruation
a.At
menopause there is an abrupt increase in gonadotrophic hormones
b. The beginning of the menstrual cycle is called menarche
c.
During normal menstruation about 40ml of blood is lost
d.
Menstrual fluid can easily clot
Correct answer: d, Menstrual blood does not easily
clot as the clotting factors are missing.
100. In females hormone inhibin is secreted by
a.
Granulosa cells and corpus luteum b.Granulosa
and theca cells
c.
Granulosa and cumulus oophorus cells d.
Granulosa cells and Zona pellucida.
Correct answer: a, Granulosa cells and corpus
luteum secretes the hormone inhibin.
