The difference between spermiogenesis and spermiation is
a.
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
b.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
c.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
Correct Answer
d.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
Step-by-Step AI Explanation
Verified Method
Spermiogenesis is the transformation of spermatids into spermatozoa. Spermiation is the process by which mature spermatozoa are released from the Sertoli cells into the lumen of the seminiferous tubules.
Q46mcq
The difference between spermiogenesis and spermiation is:
a.
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
b.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
c.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
Correct Answer
d.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
Step-by-Step AI Explanation
Verified Method
Spermiogenesis is the transformation of spermatids into spermatozoa, whereas spermiation is the release of sperms from Sertoli cells into the lumen of the seminiferous tubule.
Q47mcq
The amnion of a mammalian embryo is derived from:
a.
ectoderm and mesoderm
Correct Answer
b.
endoderm and mesoderm
c.
ectoderm and endoderm
d.
mesoderm and trophoblast
Step-by-Step AI Explanation
Verified Method
The amnion is formed from the mesoderm on the outer side and the ectoderm on the inner side.
Q48mcq
The contraceptive ‘SAHELI’:
a.
blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
Correct Answer
b.
increases the concentration of estrogen and prevents ovulation in females.
c.
is a post-coital contraceptive.
d.
is an IUD.
Step-by-Step AI Explanation
Verified Method
Saheli is a non-steroidal, once-a-week pill containing centchroman, which functions via selective estrogen receptor modulation (SERM) to prevent implantation.
Q49mcq
Hormones secreted by the placenta to maintain pregnancy are:
a.
hCG, hPL, progestogens, prolactin
b.
hCG, hPL, estrogens, relaxin, oxytocin
c.
hCG, progestogens, estrogens, glucocorticoids
d.
hCG, hPL, progestogens, estrogens
Correct Answer
Step-by-Step AI Explanation
Verified Method
The placenta secretes hCG, hPL, progestogens, and estrogens to support pregnancy.
Q50mcq
Match the items given in Column I with those in Column II and select the correct option given below: Column I: a. Proliferative Phase, b. Secretory Phase, c. Menstruation. Column II: i. Breakdown of endometrial lining, ii. Follicular Phase, iii. Luteal Phase.
a.
(1) a-iii, b-ii, c-i
b.
(2) a-i, b-iii, c-ii
c.
(3) a-iii, b-i, c-ii
d.
(4) a-ii, b-iii, c-i
Correct Answer
Step-by-Step AI Explanation
Verified Method
Proliferative phase is the follicular phase (ii). Secretory phase is the luteal phase (iii). Menstruation involves the breakdown of the endometrial lining (i).
Q51mcq
All of the following are part of an operon except:
a.
an operator
b.
structural genes
c.
a promoter
d.
an enhancer
Correct Answer
Step-by-Step AI Explanation
Verified Method
Enhancers are regulatory DNA sequences typically found in eukaryotes, while operons are characteristic of prokaryotic gene regulation.
Q52mcq
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by:
a.
Only daughters
b.
Only sons
c.
Both sons and daughters
Correct Answer
d.
Only grandchildren
Step-by-Step AI Explanation
Verified Method
A mother passes one of her X chromosomes to all her children, regardless of sex (sons and daughters).
Q53mcq
According to Hugo de Vries, the mechanism of evolution is:
a.
Multiple step mutations
b.
Saltation
Correct Answer
c.
Minor mutations
d.
Phenotypic variations
Step-by-Step AI Explanation
Verified Method
Hugo de Vries proposed that evolution occurs through large, sudden, discontinuous changes, which he termed 'saltation'.
Q53mcq
According to Hugo de Vries, the mechanism of evolution is
a.
Multiple step mutations
b.
Saltation
Correct Answer
c.
Minor mutations
d.
Phenotypic variations
Step-by-Step AI Explanation
Verified Method
As per the mutation theory given by Hugo de Vries, evolution is a discontinuous phenomenon or saltatory phenomenon/saltation.
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Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
a.
b, c and e
b.
a, b and c
c.
a, c and e
d.
b, d and e
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Match the items given in Column I with those in Column II and select the correct option given below:
Column-I (a) Eutrophication, (b) Sanitary landfill, (c) Snow blindness, (d) Jhum cultivation
Column-II (i) UV-B radiation, (ii) Deforestation, (iii) Nutrient enrichment, (iv) Waste disposal
a.
(1) ii i iii iv
b.
(2) i iii iv ii
c.
(3) i ii iv iii
d.
(4) iii iv i ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (a) Tricuspid valve, (b) Bicuspid valve, (c) Semilunar valve
Column II (i) Between left atrium and left ventricle, (ii) Between right ventricle and pulmonary artery, (iii) Between right atrium and right ventricle
a.
(1) iii i ii
b.
(2) i iii ii
c.
(3) ii i iii
d.
(4) i ii iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (a) Tidal volume, (b) Inspiratory Reserve volume, (c) Expiratory Reserve volume, (d) Residual volume
Column II (i) 2500 – 3000 mL, (ii) 1100 – 1200 mL, (iii) 500 – 550 mL, (iv) 1000 – 1100 mL
a.
(1) iii ii i iv
b.
(2) iii i iv ii
c.
(3) iv iii ii i
d.
(4) i iv ii iii
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Match the items given in Column I with those in Column II and select the correct option: Column I: a. Fibrinogen, b. Globulin, c. Albumin. Column II: (i) Osmotic balance, (ii) Blood clotting, (iii) Defence mechanism.
a.
a-(iii), b-(ii), c-(i)
b.
a-(i), b-(ii), c-(iii)
c.
a-(ii), b-(iii), c-(i)
d.
a-(i), b-(iii), c-(ii)
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Match the items given in Column I with those in Column II and select the correct option: Column I (Function): a. Ultrafiltration, b. Concentration of urine, c. Transport of urine, d. Storage of urine; Column II (Part of Excretory system): i. Henle's loop, ii. Ureter, iii. Urinary bladder, iv. Malpighian corpuscle, v. Proximal convoluted tubule.
a.
a-iv, b-v, c-ii, d-iii
b.
a-iv, b-i, c-ii, d-iii
c.
a-v, b-iv, c-i, d-iii
d.
a-v, b-iv, c-i, d-ii
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Match the items given in Column I with those in Column II and select the correct option: Column I: a. Glycosuria, b. Gout, c. Renal calculi, d. Glomerular nephritis; Column II: i. Accumulation of uric acid in joints, ii. Mass of crystallised salts within the kidney, iii. Inflammation in glomeruli, iv. Presence of glucose in urine.
a.
a-iii, b-ii, c-iv, d-i
b.
a-i, b-ii, c-iii, d-iv
c.
a-iv, b-i, c-ii, d-iii
d.
a-ii, b-iii, c-i, d-iv
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
a.
Hydrilla
b.
Yucca
c.
Viola
d.
Banana
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What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g; Primary consumer : 60 g; Primary producer : 10 g
a.
Inverted pyramid of biomass
b.
Pyramid of energy
c.
Upright pyramid of biomass
d.
Upright pyramid of numbers
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Match the items given in Column I with those in Column II and select the correct option given below: Column I: a. Herbarium, b. Key, c. Museum, d. Catalogue. Column II: (i) It is a place having a collection of preserved plants and animals, (ii) A list that enumerates methodically all the species found in an area with brief description aiding identification, (iii) Is a place where dried and pressed plant specimens mounted on sheets are kept, (iv) A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
a.
(1) (i) (iv) (iii) (ii)
b.
(2) (iii) (ii) (i) (iv)
c.
(3) (iii) (iv) (i) (ii)
d.
(4) (ii) (iv) (iii) (i)
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