One tax regime is a major relief to the manufacturers. It simplified the process and encourage the business man to invest more. GST will lead to increase in production potential, increases the GDP of an economy. Therefore, national imcome of the economy will increase. Due to increase in national income with fuller utilisation of resources, PPC will shift rightward.

The orbitals with the value l= 1 are the p orbitals which contain a nodal plane including the nucleus hence forming a dumbbell shape. The orbitals with l= 2 are the d orbitals which have complex shapes with at least two nodal surfaces. The orbitals with l= 3 are called the f orbitals that are more complex. d orbitals are wavefunctions with ℓ = 2. They have an even more complex angular distribution than the p orbitals. For most of them it is a "clover leaf" distribution (something like 2 dumbbells in a plane). dorbitals have two angular nodes (two angles at which the probability of electron is always zero. An orbital is a wave function for an electron defined by the three quantum numbers, n, ℓ and ml. Orbitals define regions in space where you are likely to find electrons. ... p orbitals (ℓ = 1) are dumb-bell shaped. The three possible p orbitals are always perpendicular to each other.

Avogadro's work was brought to light after his death, by Cannizzaro .

Viriods are the sub-virals which is the smallest agent of infectious disease.

While Virus infects the plants and animals, viriod affects the plants only.

Common Cold Virus, Influenza virus etc are some of the example of virus. Potato Spindle tuber Viroid is an example of Viroid.

The Genome of virus is DNA and RNA but Viroid is consist of RNA only.

Production Possibilities Curve (ppc) The Production Possibilities Curve (PPC) models a two-good economy by mapping production of one good on the x-axis and production of the other good on the y-axis. Points inside the PPC result from inefficiency; output combinations outside the PPC are impossible to produce. Production possibilities curve (PPC) (also called a production possibilities frontier) a graphical model that represents all of the different combinations of two goods that can be produced; the PPC captures scarcity of resources and opportunity costs.

Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy.  About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum. Solar radiation, often called the solar resource, is a general term for the electromagnetic radiation emitted by the sun. Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies.

A set is well-defined if there is no ambiguity as to whether or not an object belongs to it, i.e., a set is defined so that we can always tell what is and what is not a member of the set.

Homo is the Latin word for 'human' or 'man' and sapiens is derived from a Latin word that means 'wise' or 'astute'. The evolution of modern humans from our hominid ancestor is commonly considered as having involved four major steps: evolving terrestriality, bipedalism, a large brain (encephalization) and civilization. Cro Magnon is the first example of class Homo sapiens.

in palaeolithic age man was a food gatherer. but after many years when the mesolithic age began and now it was warm and there was plenty of food . then man saw how seeds grew into new plants . he then started farming and also reared animals like dog. this was how man changed from a food gatherer to a food producer.

During these years, people still used tools and weapons made of stone, but as they adapted from the hunter-gatherer lifestyle into farming, their uses changed and became multi-purpose. The axe was made from a process of striking and shaping rock, called flaking, for protection and for clearing fields. The Stone Age was a time thousands of years ago, when humans lived in caves and jungles. Life was simple, and there were only two main things to do – to protect themselves from the wild animals and to gather food. Since in those times, humans used stone for almost everything they did, hence the name Stone Age. Stone tools existed before the advent of controlled fire, but Stone Age humans combined the two technologies. They discovered that heating rocks around a fire brought out impurities, making the rocks easier to chip into stone tools.