Q1.All the support structures which facilitates development of a country constitute its
Answer : Option BExplaination / Solution:
Infrastructure is the basic physical systems of a business or nation; transportation, communication, sewage, water and electric systems are all examples of infrastructure. They are vital to a country's economic development and prosperity.
Answer : Option DExplaination / Solution:
In Economics, goods are materials that satisfy human wants and provide utility. A good may be a consumable item that is useful to people but scarce in relation to its demand, so that human effort is required to obtain it.
Answer : Option AExplaination / Solution:
Dalton was developed the theory of the structure of matter and this theory is known as Dalton’s atomic theory. His research was based on experiments and also from law of chemical combination. Dalton’s atomic theory was quickly explained the many heretofore unexplained chemical phenomena. Dalton’s atomic theory quickly became the theoretical foundation in chemistry.
Dalton’s atomic theory stated that:
All the matter is made of atoms which are tiny particles and indivisible.
All the given atom of the element is identical in mass, size, shape, and in other properties.
All different elements have different types of atoms and also different in their mass, size, shape, and in other properties.
All the atom of an element cannot be made or destroyed.
Answer : Option BExplaination / Solution:
Biotic components include all living organisms present in an ecosystem. Competitors and predators are biotic components of habitat.
Answer : Option CExplaination / Solution: Zn2+ also serves as an activator of a group of enzymes: alcohol dehydrogenase, pyridine nucleotide dehydrogenase, carboxypeptidase.
Answer : Option AExplaination / Solution:
Each tooth is embedded in a socket of jaw bone called thecodont. Human being forms two sets of teeth during their life temporary milk or deciduous teeth replaced by a set of permanent or adult teeth called diphyodont. An adult human has 32 permanent teeth which are of four different types called heterodont.
Answer : Option AExplaination / Solution:
A number of bacteria, fungi, virus etc. cause disease in human beings. These disease causing microbes are called pathogens.