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Zoology
- Online Test
TN State Board
TN 12th Standard
Zoology
TEST : 25
TN State Board
TN 12th Standard
Zoology
Chapter 11: Organisms and Population
Prepare / Learn
Q1.
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt=rN(1-N/K):
A.
When N/K is exactly one
B.
When N nears the carrying capacity of the habitat
C.
When N/K equals zero
D.
When dearth rate is greater than birth rate
View Solution
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 13: Environmental Issues
Prepare / Learn
Q2.
Which of the following is not one of the primary health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
A.
Increased skin cancer
B.
Reduced immune system
C.
Damage to eyes
D.
Increased liver cancer
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 2: Human Reproduction
Prepare / Learn
Q3.
Hormones secreted by placenta to maintain pregnancy are
A.
hCG, hPL, progesterone, estrogen
B.
hCG, hPL, estrogen, relaxin, oxytocin
C.
hCG, hPL, progesterone, prolactin
D.
hCG, progesterone, estrogen, glucocorticoids
View Solution
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Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 4: Principles of Inheritance and Variation
Prepare / Learn
Q4.
ZW-ZZ system of sex determination occurs in
A.
Fishes
B.
Reptiles
C.
Birds
D.
All of these
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 5: Molecular Genetics
Prepare / Learn
Q5.
Reverse transcriptase is
A.
RNA dependent RNA polymerase
B.
DNA dependent RNA polymerase
C.
DNA dependent DNA polymerase
D.
RNA dependent DNA polymerase
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 7: Human Health and Diseases
Prepare / Learn
Q6.
Which one of the following statements is correct with respect to AIDS?
A.
The HIV can be transmitted through eating food together with an infected person.
B.
Drug addicts are least susceptible to HIV infection.
C.
AIDS patients are being fully cured 100 percent with proper care and nutrition.
D.
The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers.
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 10: Applications of Biotechnology
Prepare / Learn
Q7.
Which one is true state regarding DNA polymerase used in PCR?
A.
It is used to ligate introduced DNA in recipient cells.
B.
It serves as selectable marker
C.
It is isolated from a virus.
D.
It remains active at high temperature.
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 13: Environmental Issues
Prepare / Learn
Q8.
Increase in the concentration of the toxicant at successive trophic levels is known as
A.
Biodeterioration
B.
Biotransformation
C.
Biogeochemical cycling
D.
Biomagnifications
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 2: Human Reproduction
Prepare / Learn
Q9.
Match and select the correct option
A.
A:3, B:2,C:1
B.
A:2, B:3,C:1
C.
A:1, B:3,C:2
D.
A:3, B:1,C:2
View Solution
Add Work Space
Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Zoology
Chapter 4: Principles of Inheritance and Variation
Prepare / Learn
Q10.
Co-dominant blood group is
A.
A
B.
AB
C.
B
D.
O
View Solution
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Answer :
Option B
Explaination / Solution:
No Explaination.
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TN State Board
TN 12th Standard
Zoology
TEST : 25
Zoology
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Chapter 1: Reproduction in Organisms
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Chapter 2: Human Reproduction
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Chapter 3: Reproductive Health
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Chapter 4: Principles of Inheritance and Variation
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Chapter 5: Molecular Genetics
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Chapter 6: Evolution
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Chapter 7: Human Health and Diseases
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Chapter 8: Immunology
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Chapter 9: Microbes in Human Welfare
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Chapter 10: Applications of Biotechnology
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Chapter 11: Organisms and Population
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Chapter 12: Biodiversity and its Conservation
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Chapter 13: Environmental Issues
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