We couldn't be where we are without microscopes and other technology. We couldn't study almost anything we know without these modern inventions.
50% is new and the other 50% comes from the old original DNA.
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
Explanation:
Water is generally regarded as universal solvent due to its ability to dissolve a wide range of compounds.
A water molecule has partial positive and negative charges on it thus, it is a polar compound.
- The binding rule for substances to dissolve one another is that they must be like one another.
- Polar solutes or substance only dissolves in polar solvents. Non-polar substances will dissolve in non-polar solvents.
- Water is polar and ionic substances are polar too.
- In water, the positive end of a salt is completely surrounded by water molecules and they hydrate it. The same analogy goes for the negative end.
- This is called hydration.
- The hydration complex keeps the salt dispersed in the water.
- This why water is able to dissolve a broad range of substances.
learn more:
Chemical covalent bond brainly.com/question/10903097
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