A natural disaster wipes out most of a population. The allele frequencies of the surviving population may not be the same as the allele frequencies of the original population. This form of genetic drift is called

Bottleneck effect

Explanation:

In bottle neck effect, the amount of genetic variation of a population reduces in lieu to its inability  to adapt to new selection pressure such as climatic change, natural disaster etc. thereby reducing the size of the population by at least one generation.  

For example –  

The genetic variation of Northern elephant seals  is caused by the human inflicted bottleneck i.e excessive hunting

a chair, a bed, and a toothbrush

explanation:

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.