Which one of the following is not an electromagnetic wave?

• Radio wave
• X-ray
• Visible light
• Sound wave
Correct Option: D  [ Sound wave ]

Remark:

What is Bryolory?

• Study of food
• Study of fruit
• Study of mosses and liverworts
• Study of rings
Correct Option: C  [ Study of mosses and liverworts ]

Remark:

Which of the following adds/add carbon dioxide to the carbon cycle on the planet earth ?
1. Volcanic action
2. Respiration
3. Photosynthesis
4. Decay of organic matter
(Select correct answer)

• 1, 2 and 4 only
• 1 and 3 only
• 2 only
• 1, 2 and 3 only
Correct Option: A  [ 1, 2 and 4 only ]

Remark:

The sun is seen before the actual sunrise because of:

• re?ection
• refraction
• scattering of light
• rectilinear propagation of light
Correct Option: B  [ refraction ]

Remark:

If a liquid is heated in space under no gravity, the transfer of heat will take place by process of:

• conduction
• convection
• radiation
• cannot be heated in the absence of gravity
Correct Option: C  [ radiation ]

Remark:

A radar which detect the presence of an aircraft in sky uses :

• Sound waves
• Radio waves
• Ultrasonic waves
• Infrared rays
Correct Option: B  [ Radio waves ]

Remark:

Which of the following elements is essential for the transmission of nerve impulses in nerve fibers of human body ?

• Calcium
• Iron
• Sodium
• Zinc
Correct Option: C  [ Sodium ]

Remark:

Which one of the following organs is the main respiratory organ of whale?

• Integuments
• Gills
• Lungs
• Trachea
Correct Option: C  [ Lungs ]

Remark:

In coriander the useful parts are:

• roots &leaves
• leaves & flowers
• leaves & dried fruits
• flower& dried fruits
Correct Option: C  [ leaves & dried fruits ]

Remark:

The growth of bacteria is measured by:

• hemocytometer
• spectrophotometer
• calorimeter
• auxanometer
Correct Option: B  [ spectrophotometer ]

Remark: