Questions

Therefore the answer for What travels around the world but stays in one spot is STAMP or any other thing that acts as a stamp does.

Ex. the letter in the envelope etc...

Since, Several things have the possibility, but the word travel evokes that it would move. 

While eating a watermelon, we all go along the red and stops at green.

Energy can be transferred from one system to the other. The rate at which energy is transferred from one system to other system is called POWER. Energy transferred in one second is called a watt.

The conspicuous role of Gandhi is that of a person who makes changes to something in order to improve it.

The process of copying dna is called Replication.

Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA. He is who studied the structure and function of nucleic acids.

The discovery of Identification of Ribose and Deoxyribose is attributed to Phoebus Levene.

Claude Bernard was a French physiologist, who first recognised plant stomata opening and closing to maintain homeostasis.