TNPSC General Knowledge - Environmental Studies
Exam Duration: 45 Mins Total Questions : 30
In our country the Van Mahotsav Day is observed on
- (a)
Second of October
- (b)
First of December
- (c)
Tenth of August
- (d)
First of July
What is portable water otherwise known as?
- (a)
Raw water
- (b)
Irrigation water
- (c)
Drinking water
- (d)
Surface water
What is considered a life-giving and life-supporting system in Vedic literature?
- (a)
Rain
- (b)
Cloud
- (c)
Stream
- (d)
River
Anal cerci occur in
- (a)
Both male and female cockroches
- (b)
Male cockroach
- (c)
Female cockroach
- (d)
Female Ascaris
Number of ganglia present in nerve cord of Cockroach is
- (a)
12
- (b)
10
- (c)
9
- (d)
6
What animal is capable of learning human sign language?
- (a)
Bird
- (b)
Chimpanzee/ape/monkey
- (c)
Kangaroo
- (d)
None of these
Carbon dioxide absorbs radiation in the range:
- (a)
5.5 and 7 microns
- (b)
Greater than 27 microns
- (c)
8 to 13 microns
- (d)
0.1 to 30 microns
Sodium is usually estimated by which of the following analytical technique:
- (a)
Flame Photometry
- (b)
Coulometry
- (c)
High pressure liquid chromotography
- (d)
Visible spectrophotometry
When water enters the cell, over one of the pressures is exerted on cell wall
- (a)
Osmotic pressure
- (b)
Sunaction pressure
- (c)
Turgor pressure
- (d)
Root pressure
The existence of root pressure can be demonstrated by
- (a)
Exudation or bleeding
- (b)
Wilting
- (c)
Transpiration
- (d)
Bleeding
The rate of absorption of water ----- with increase in salt concentration in the soil
- (a)
Remains unchanged
- (b)
Increase
- (c)
Decreases
- (d)
No effect
Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.
- (a)
Concentration
- (b)
biomagnification
- (c)
expansion
- (d)
pollution
Acid rain is caused by:
- (a)
CO and CO2,
- (b)
SO2 ,and O2
- (c)
SO2 and NO''2
- (d)
NO2 and O2
What will be the outcome of Eutrophication of surface waters?
- (a)
Overproduction of biomass
- (b)
Decrease in nitrogen concentration
- (c)
Decrease in phosphorus concentration
- (d)
Decrease in both nitrogen and phosphorus concentrations.
Which of the following physical forces are supported to be responsible for ascent as sap?
- (a)
Imbibition
- (b)
Capillary force
- (c)
Transpiration pull and cohesion
- (d)
Root pressure
The ascent of sap takes place in
- (a)
Xylem parenchyma
- (b)
Walls of tracheary elements
- (c)
Tracheids with associated xylem parenchyma
- (d)
Lumen of tracheary elements
Stomata open and close due to
- (a)
Tugor pressure of guard cells
- (b)
Root pressure
- (c)
Positive pressure
- (d)
Imbibitional pressure
The least preferred technique in the disposal of municipal solid waste is:
- (a)
Incineration
- (b)
composting
- (c)
land filling
- (d)
bricketting
Bacterial decomposition of biological material under aerobic condition is:
- (a)
Fermentation
- (b)
Fertilization
- (c)
Contamination
- (d)
Composting
In the analysis 15 water samples, Ca and Mg gave a correlation of +0.95. It means:
- (a)
Ca came from soil and Mg came from biota
- (b)
Ca and Mg both came from the same type of water
- (c)
Ca and Mg are both cogenetic
- (d)
Ca and Mg came from different sources.
Organisms that generate energy using light are:
- (a)
Oligotrophs
- (b)
chaemorganotrophs
- (c)
chaemolithotrophs
- (d)
photoautotrophs
To conserve coral reefs the Govt, of India declared one of the following as Marine Park:
- (a)
Gulf of Kutch
- (b)
Lakshadweep islands
- (c)
Gulf of Mannar
- (d)
Andaman Islands
Stomata opens because the guard cells have --
- (a)
Outer thin walls
- (b)
Chloroplast
- (c)
Inner thick walls
- (d)
Kidney shape
The special modified epidermal cells surroding stomatal pore are called
- (a)
Epithelial cells
- (b)
Guard cells
- (c)
Subsiduary cells
- (d)
Accessory cells
Transpiration through leaves in called as
- (a)
Cauline transpiration
- (b)
Foliar transpiration
- (c)
Cuticular transpiration
- (d)
Lenticular transpiration
Which of the following disease is not the caused by water pollution?
- (a)
Typhoid
- (b)
Dysentery
- (c)
Malaria
- (d)
Jaundice
Sparying of DDT on crops causes pollution of:
- (a)
Soil and Water
- (b)
Air and Soil
- (c)
Crops and Air
- (d)
Air and Water
Goitre: swelling of thyroid glands occurs due to the deficiency of ----.
- (a)
iron
- (b)
pottasium
- (c)
phosphorus
- (d)
iodine
Which of the following nutrients is not present in milk?
- (a)
Protein
- (b)
Vitamin C
- (c)
Calcium
- (d)
Vitamin D
Which of the following is considered as 'body building foods'?
- (a)
Proteins
- (b)
Vitamins
- (c)
Fats
- (d)
Carbohydrates