51. Which of the following hormones can
play a significant role in osteoporosis?
(1) Estrogen and Parathyroid hormone
(2) Progesterone and Aldosterone
(3) Aldosterone and Prolactin
(4) Parathyroid hormone and Prolactin
Answer: (1) Estrogen and Parathyroid hormone
52. Which of the following structures
or regions is incorrectly paired with its functions?
(1) Hypothalamus : production of releasing
hormones and regulation of
temperature,hunger and thirst.
(2) Limbic system : consists of fibre tracts
that interconnect different regions of
brain; controls movement.
(3) Medulla oblongata : controls
respiration and cardiovascular reflexes.
(4) Corpus callosum : band of fibers connecting
left and right cerebral hemispheres.
Answer (2) Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
53. The amnion of mammalian embryo is
derived from
(1) mesoderm and trophoblast
(2) endoderm and mesoderm
(3) ectoderm and mesoderm
(4) ectoderm and endoderm
Answer
54. Hormones secreted by the placenta
to maintain pregnancy are
(1) hCG, hPL, progestogens, estrogens
(2) hCG, hPL, estrogens, relaxin,
oxytocin
(3) hCG, hPL, progestogens, prolactin
(4) hCG, progestogens, estrogens, glucocorticoids
Answer (1) hCG, hPL, progestogens, estrogens
55. The difference between spermiogenesis
and spermiation is
(1) In spermiogenesis spermatozoa from sertoli
cells are released into the cavity of seminiferous tubules, while in
spermiation spermatozoa are formed.
(2) In spermiogenesis spermatozoa are formed,
while in spermiation spermatids
are formed.
(3) In spermiogenesis spermatids are
formed, while in spermiation spermatozoa are formed.
(4) In spermiogenesis spermatozoa are formed,
while in spermiation spermatozoa
are released from sertoli cells into the
cavity of seminiferous tubules.
Answer (4) In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
56. The contraceptive ‘SAHELI’
(1) is an IUD.
(2) increases the concentration of
estrogen and prevents ovulation in females.
(3) blocks estrogen receptors in the
uterus, preventing eggs from getting implanted.
(4) is a post-coital contraceptive.
Answer (3) blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
57. Ciliates differ from all other
protozoans in
(1) using pseudopodia for capturing prey
(2) having a contractile vacuole for
removing excess water
(3) using flagella for locomotion
(4) having two types of nuclei
Answer (4) having two types of nuclei
58. I dentify the vertebrate group of
animals characterized by crop and gizzard in its digestive system
(1) Aves (2) Reptilia (3) Amphibia (4)
Osteichthyes
Answer (1) Aves
59. Which of the following features is
used to identify a male cockroach from a female cockroach?
(1) Forewings with darker tegmina
(2) Presence of caudal styles
(3) Presence of a boat shaped sternum on
the 9th abdominal segment
(4) Presence of anal cerci
Answer (2) Presence of caudal styles
60. Which one of these
animals is not a homeotherm?
(1) Camelus (2) Chelone (3) Macropus (4) Psittacula
(1) Camelus (2) Chelone (3) Macropus (4) Psittacula
Answer (2) Chelone