Explanation

 The main purpose of white blood cells, also known as leukocytes, 

  They protect the body from infection and disease by fighting off harmful pathogens and other foreign substances. 

Explanation

 The capital of the Xinjiang Uyghur Autonomous Region of China is Ürümqi. 

Capital: Urumqi

Region: Xinjiang Uyghur Autonomous Region

Location: Northwestern China

Other Names: Also known as Urumqi

Explanation

 The eustachian tube is not part of the inner ear; the inner ear consists of the cochlea, semicircular canals, and the vestibule (which includes the utricle and saccule). 

Explanation

The reason is that the rails expand in summer

. The gap is provided to allow for this expansion.

If no gap is left the expansion in summer will cause the rails to bend sideways

This may result in train accidents.

Explanation

To induce fission in Uranium-238 (²³⁸U), you need Fast neutrons. 

Fast Neutrons:

Fast neutrons have sufficient kinetic energy to overcome the repulsive forces within the nucleus and initiate fission

Explanation

Explanation

 The science of treating the muscular and skeletal system, also known as the musculoskeletal system, is called orthopedics. 

Explanation

Explanation

Since he saves 15% of his annual income, we can set up the equation:

15% of x = 500

To find the value of x, we can convert the percentage to a decimal by dividing by 100:

0.15x = 500

Now, divide both sides by 0.15:

x = 500 / 0.15

x = 3333.33

So, the man's annual income is Rs. 3333.33.

Explanation

Pertussis is commonly known as whooping cough.