Which nutrient deficiency is least common? Of what age bracket of the population is this deficiency most common?


The tata box is located at a position that is approximately -25 relative to the site where the transcription starts.

so the possible answer is letter b. -24
The whole earth is made of rocks & minerals. inside the earth there is a liquid core of molten rock and on the outside there is a hard crust. if you compare the earth to an egg, the shell on an egg is like the crust on the earth. the crust is made up of rocks and minerals. much of the crust is covered by water, sand, soil and ice. if you dig deep enough, you will always hit rocks.

below the loose layer of soil, sand & crumbled rocks found on earth is bedrock, which is a solid rock.

the crust makes up less than 1% of the earth’s mass (0.4%) it is made of oxygen, magnesium, aluminum, silicon, calcium, sodium, potassium, iron. there are 8 elements that make up 99% of the earth’s crust. the continents are about 35 km thick and the ocean floors are about 7 km thick.
We separarate solid heterogeneous mixture  (solids that can be seen the difference on them and can touch) by handpicking


image result for scientific revolution of middle east​

the middle east is ripe for a scientific revolution. scientific research in the arabian, persian and turkish middle east lags behind that of the west. of course, there are individual scientists who produce world-class research and there are institutions and nations which make significant contributions in certain fields ..

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