In order for gas to leave a planet it needs to be hot enough and to overcome the planets gravity. The outer planets are colder and are very big compared to earth.
your answer is C. it is temp where water vapours start to condense and forms liquid droplet from vapour condition.
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There are two hydrogen atoms in a molecule of water.
I believe the answer is Yy. Although Y represents the dominant trait for yellow, it being paired with the recessive trait, y, has the chance of a plant with green seeds to be produced in the next generation.
The answers are: BB Bb bb