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MEDIUM
ENGLISH
Biology
Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
A
Bacteria
Option A
B
Viruses
Option B
C
Fungi
Option C
D
Cyanobacteria
Option D
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MEDIUM
ENGLISH
Biology
Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap
A
Increases.
Option A
B
Lowers.
Option B
C
Doesn’t effect.
Option C
D
Maintains.
Option D
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MEDIUM
ENGLISH
Biology
Single circuit heart is found in_________?
A
Fishes
Option A
B
Amphibians
Option B
C
Reptiles
Option C
D
Mammals
Option D
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MEDIUM
ENGLISH
Biology
Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis
A
Diffusion
Option A
B
Active transport
Option B
C
Osmosis
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Biology
Which of the following is true about hearts of earthworm?
A
There are 5-7 pairs of heart.
Option A
B
They are present between 1-7th segments.
Option B
C
They are present lateral to the oesophagus.
Option C
D
They pump blood from ventral to dorsal vessel.
Option D
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MEDIUM
ENGLISH
Biology
It has been estimated that in a normal person plasma constitutes about ________ by volume of blood.
A
35%
Option A
B
45%
Option B
C
55%
Option C
D
75%
Option D
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MEDIUM
ENGLISH
Biology
Brown fat present in certain mammals is specialized in___________?
A
Providing insulation in cold environment.
Option A
B
Providing insulation in hot environment
Option B
C
Rapid heat production.
Option C
D
Controlling heat production.
Option D
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MEDIUM
ENGLISH
Biology
Panting is a representative of which mechanism?
A
Pigmentation.
Option A
B
Respiration.
Option B
C
Evaporative cooling.
Option C
D
Excretion.
Option D
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MEDIUM
ENGLISH
Biology
Formation of heat shock proteins in plants results in___________?
A
Elevation of temperature in cold conditions.
Option A
B
Embracing the enzymes and other proteins and prevent their denaturation.
Option B
C
Change the chemical nature of other proteins thus making them heat resistant.
Option C
D
Help in evaporative cooling.
Option D
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MEDIUM
ENGLISH
Biology
Fishes, most of the invertebrates and amphibians are examples of ________ animals?
A
Endotherms
Option A
B
Ectotherms
Option B
C
Heterotherms
Option C
D
Homeotherms
Option D
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MEDIUM
ENGLISH
Biology
The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called________?
A
Homeostasis
Option A
B
Hemostasis
Option B
C
Osmoregualtion
Option C
D
Thermoregulation
Option D
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MEDIUM
ENGLISH
Biology
Which of the following represents osmoregulatory steps taken by hydrophytes?
A
Increases transpiration by increasing the surface area of the leave.
Option A
B
Small and thick leaves to decrease the surface area proportional to the volume of the leave.
Option B
C
Stomata closing in sufficient supply, and opening in restricted supply of water.
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Biology
Most of the marine invertebrates are__________?
A
Osmoconformers
Option A
B
Osmoregulators
Option B
C
Both depend upon the concentration of sea water
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Biology
Which of the following marine fishes are considered direct descendents of fresh water ancestors?
A
Hagfish
Option A
B
Jelly Fish
Option B
C
Star Fish
Option C
D
Bony fishes
Option D
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MEDIUM
ENGLISH
Biology
Which excretory product in produced in plants during autotrophic mode of life?
A
CO2
Option A
B
H2O
Option B
C
O2
Option C
D
Both A and B
Option D
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MEDIUM
ENGLISH
Biology
Which of the following statement about conifers is correct?
A
Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
Option A
B
Accumulate waste in leaves, which fall in autumn.
Option B
C
Production of black wood in the center.
Option C
D
Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.
Option D
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MEDIUM
ENGLISH
Biology
Purine and pyrimidine metabolism results in production of____________?
A
Creatinine
Option A
B
Trimethyamine oxide
Option B
C
Xanthine
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Biology
Amount of water required to excrete 1gN of Urea is_________?
A
1 ml
Option A
B
50 ml
Option B
C
100 ml
Option C
D
150 ml
Option D
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MEDIUM
ENGLISH
Biology
Each ach nephridium of earthworm opens to the exterior by__________?
A
Nephrostome
Option A
B
Nephridiopore
Option B
C
Flame cell
Option C
D
Anus
Option D
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MEDIUM
ENGLISH
Biology
The main nitrogenous waste formed in the body of earthworm is/are___________?
A
Ammonia
Option A
B
Urea
Option B
C
Uric acid
Option C
D
Trimethylamine oxide
Option D
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