Questions

Nelson Mandela and Frederik Willem de Klerk has won the Nobel Peace Prize in 1993 for their work for the peaceful termination of the apartheid regime, and for laying the foundations for a new democratic South Africa.

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

In a concentrated solution there is a large amount of solute.

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.

Fluoride deficiency is a disorder which may cause increased dental caries due to a lack of fluoride in the diet. Dental caries or tooth decay is the breakdown of dental tissues by the acidic products released by the "bacterial fermentation of dietary carbohydrates”

The main goals of psychology are four. They are::

1. To describe,

2. To explain,

3. To predict (and)

4. To control the behavior and mental processes of others.