Year-wise Biology practice
NEET 2019 Biology PYQs Check your understanding, bookmark questions and revisit your mistakes.
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90 questions in this collection · Page 7 of 9
Evolution
n a species, the weight of newborn ranges from 2
to 5 kg. 97% of the newborn with an average weight
between 3 to 3.3kg survive whereas 99% of the
infants born with weights from 2 to 2.5 kg or 4.5
to 5 kg die. Which type of selection process is taking place?
A Stabilizing Selection B Directional Selection C Disruptive Selection D Cyclical Selection
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Evolution
Match the hominids with their correct brain size :
(A)Homo habilis
(I)900 cc
(B)Homo neanderthalensis
(II)1350 cc
(C)Homo erectus
(III)650-800 cc
(D)Homo sapiens
(IV)400 cc
Select the correct option.
A (A)-(III), (B)-(I), (C)-(IV), (D)-(II) B (A)-(III), (B)-(II), (C)-(I), (D)-(IV) C (A)-(III), (B)-(IV), (C)-(I), (D)-(II) D (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
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Human Health And Disease
Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
A Salmonella typhi/Widal test B Salmonella typhi/Anthrone test C Streptococcus pneumoniae/Widal test D Plasmodium vivax/UTI test.
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Human Health And Disease
Concanavalin A is:
A an alkaloid B a lectin C an essential oil D a pigment
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Human Health And Disease
Which of the following immune responses is
responsible for rejection of kidney graft?
A Cell-mediated immune response B Inflammatory immune response C Humoral immune response D Cell-mediated immune response
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Human Health And Disease
Drug called 'Heroin' is synthesized by:
A methylation of morphine B glycosylation of morphine C acetylation of morphine D nitration of morphine
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Strategies For Enhancement In Food Production
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
A Body temperature B Moist surface of midgut C Acidic pH of stomach D Alkaline pH of gut
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Strategies For Enhancement In Food Production
Select the incorrect statement:
A Inbreeding selects harmful recessive genes that
reduce fertility and productivity B Inbreeding increases homozygosity C Inbreeding is essential to evolve purelines in any
animal D Inbreeding helps in accumulation of superior
genes elimination of undesirable genes
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Microbes In Human Welfare
Match the following organisms with the products
they produce:
(A)Lactobacillus
(I)Cheese
(B)Saccharomyces cerevisiae
(II)Curd
(C)Aspergillus niger
(III)Citric Acid
(D)Acetobacter aceti
(IV)Bread
(V)Acetic Acid
Select the correct option.
A (A)-(II), (B)-(IV), (C)-(V), (D)-(III) B (A)-(III), (B)-(IV), (C)-(V), (D)-(I) C (A)-(II), (B)-(IV), (C)-(III), (D)-(V) D (A)-(II), (B)-(I), (C)-(III), (D)-(V)
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Microbes In Human Welfare
Which of the following can be used as a biocontrol
agent in the treatment of plant disease?
A Anabaena B Chlorella C Trichoderma D Lactobacillus
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