Questions

C.P. of 10 note books ⇒ 140 × 10 = 1400 Rs.
Profit on selling one pen ⇒ 50×200/100 = Rs 100
Number of pen required ⇒ 1400/100 = 14

A rainbow is a natural spectrum appearing in the sky after a rain shower. It is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. A rainbow is always formed in a direction opposite to that of the Sun. The water droplets act like small prisms. They refract and disperse the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrops.

The "Pradhan Mantri Shram-Yogi Maandhan" scheme was launched on 15-02-2019. Under the PM-SYM scheme, the workers will get amount of Rs. 3,000 pension after attaining the age of 60 years. 

The two main products of photosynthesis are sugar and oxygen. Oxygen is emitted as waste product and sugar is used for energy preparation using sun light.

Sensation is the activation of the receptors by stimuli.

Bacteria divided and reproduce by Binary fission. In this process, the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two replicates.