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Water, H2O, HOH these are all the same compound just worded differently
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How does an organisms DNA determine it's chances of survival:
Organisms with heritable (genetically determined) features that help them survive and reproduce in a particular environment tend to leave more offspring than their peers. If this continues over generations, the heritable features that aid survival and reproduction will become more and more common in the population
How does humans manipulate DNA of organisms to be benefit themselves:
Biotechnology is the use of biological techniques and engineered organisms to make products or plants and animals that have desired traits.
<span>If we dissolve 25 grams of salt in 251 grams of water, then the mass of the resulting solution would be 276 grams. This is in accordance to the Law of Conservation of mass which states that mass cannot be created or destroyed. So, the total mass that goes in a certain process should be the same that would would go out the process. In this case, we have two streams that goes in and one stream going out which would be the solution. The two streams going in should be equal to the stream going out.
Overall mass balance:
25 grams salt + 251 grams water = mass of solution
mass of solution = 276 grams</span>
Mixtures are of 2 types.
1) Homogeneous mixture : In this type of mixture, the components of the mixture are present in the same phase. For example, Air. Air is a mixture of different gases which cannot be distinguished from each other.
2) Heterogeneous mixture : In this type pf mixture, 2 or more phases can be seen. The composition of the different components is not the same throughout the mixture.
Ex. mixture of oil and water. Here we can see 2 different phases one consisting of oil layer and the other made of water layer.
Salt water is a mixture of salt and water. Since salt is completely soluble in water, it creates a homogeneous mixture when mixed with water. We cannot distinguish salt and water once they are mixed.
To get fresh water from the salt water in the ocean, we can set up a simple distillation unit . In this, the salt water is heated to its boiling point and the vapors thus formed are allowed to cool which condense and create liquid water. This can be used as fresh water.