Questions

They are the sites at which microtubules attach to chromosomes.

Improving muscular strength and endurance slows bone density loss.

Water is the important nutrient all organisms need. Humans has almost 60% of their body weight is water. Some organisms have 90% of their body weight is of water.

In short, Democracy is a government "of the people, by the people, and for the people."

Definition :

Democracy "is government by the people in which the supreme power is vested in the people and exercised directly by them or by their elected agents under a free electoral system." 

The conditions of a democratic election are:

* Every citizen should have one vote ad every vote should have an equal value.

* Voters choose from the political parties and candidates should be free to contest elections giving the voters a real choice.

* Elections should be held at regular intervals.

* The candidate preferred by the people should get elected.

* Elections should be conducted in free and fair manner where people can choose as they really wish.

Answers B and C belong to quality management, and answer D was formulated by Elizabeth Duffy and suggested that we all try to adjust our lives so that we have a dynamic balance (homeostasis) between challenge and relaxation. Kerstner, Chapter 18

True, Water is a Pure substance and not a mixture.

We know that, A mixture is when two or more substances combine physically together. You can find that the mixture retains the properties of the original components.

In water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone.

Therefore, water is not a mixture; it is a compound and it is pure.

Clay is an example of Aquiclude.