Questions

Yes, plant cells have Mitochondria.

While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. They need mitochondria for this.

In particular, at night when there is no light, plants undergo cellular respiration since there is no sunlight to photosynthesize.

They do, however, produce far more sugar and oxygen through photosynthesis than they use up in respiration.

Activation energy is a minimum amount of energy that required for the chemical reaction to happen or to take place.

IRQ-0 is the system timer commonly use in all computers. In a computer, IRQ is an interrupt request which acts as a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead.

For intra-State movement, the e-way bill will be rolled out in a phased manner beginning April

15 and will cover all the States by June 1. Businesses will continue to file summary sales return

GSTR-3B until June as the GST (Goods and Services Tax) Council has extended the present

system of return-filing by three months. Electronic way or e-way bill for movement of goods

between States would be implemented from April 1.

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.

William James was an early proponent of functionalism.

India being number one in the Tiger population all over the world, Madhya Pradesh state has the highest number of tigers with 526 tigers and Karnataka is second with 524.