Which of the following contains maximum carbon dioxide ?

• Grasslands
• Forests
• Oceans
• Agroecosystems
Correct Option: C  [ Oceans ]

Remark:

The process in which living organisms are used to remove contaminants, pollution or other unwanted substances from soil or water is known as:

• Biotechnology
• bioremediation
• Biodegradation
• Biomagnification
Correct Option: B  [ bioremediation ]

Remark:

Heat transfer horizontally within the atmosphere is called:

• conduction
• convection
• absorption
• advection
Correct Option: D  [ advection ]

Remark:

The sex of a child before birth can be determined by:

• Amnoscopy
• Amniocentesis
• Amniograpghy
• None of these
Correct Option: B  [ Amniocentesis ]

Remark:

Which is an example of pollution-free energy?

• Coal
• Wind energy
• Mineral oil
• None of these
Correct Option: B  [ Wind energy ]

Remark:

Which among the following elements increases the absorption of water and calcium in plants ?

• Manganese
• Boron
• Copper
• Molybdenum
Correct Option: B  [ Boron ]

Remark:

Ozone hole refers to :

• hole in Ozone layer
• decrease in the Ozone layer
• decrease in thickness of Ozone layer
• increase in thickness of Ozone layer
Correct Option: C  [ decrease in thickness of Ozone layer ]

Remark:

A solar eclipse occurs when the :

• earth comes between the Sun and the Moon
• Sun comes between the earth and the moon
• Moon is at right angle to the earth
• Moon comes between the Sun and the Earth
Correct Option: D  [ Moon comes between the Sun and the Earth ]

Remark:

Which of the following vitamins are water soluble?

• Vitamin-A & Vitamin-B
• Vitamin-B & Vitamin-C
• Vitamin-C & Vitamin-D
• Vitamin-A & Vitamin-K
Correct Option: B  [ Vitamin-B & Vitamin-C ]

Remark:

Threat of 'global warming' is increasing due to increasing concentration in the atmosphere of:

• O₃
• CO₂
• SO₂
• NO₂
Correct Option: B  [ CO₂ ]

Remark: