The net amount of carbon in the atmosphere between 1750 and 2012 .

From 280 ppm to 393 ppm.

Explanation:

In 1750, the amount of carbondioxide in the atmosphere was 280 ppm which increases by 393 ppm in 2012. This is because of the pollution occurs due to industrialization and number of vehicles increased in the world. More carbondioxide gas is released due to the smoke produced from burning of fossil fuels in industries and vehicles. So we can say that pollution is the main reason for increasing carbondioxide concentration in the atmosphere.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.