Organ systems are made up of tissues which are made up of cells.
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Answer:

point mutation, change within a gene in which one base pair in the DNA sequence is altered. Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations
Ductility is a physical property.
A physical property of a material is a property that can be measured or observed without changing the composition of the material.
In this case ductility is a physical property. It is defined as the property of a material associated with the ability to be drawn or stretched into a wire without breaking. The chemical identity of the material is not affected, that is it does not change.
Example of ductile materials include gold, silver, copper, erbium, terbium and samarium.
Other examples of physical properties are:
1. Solubility
2. Melting point.
3. Boiling point.
4. Color
5. Density.
Answer:c. one fact about a person or an item.
Explanation:
Database table is is made up of fields. A field is simply a data structure for a type-single piece of data.
Fields can be organized into what is known as records, which is one that contain all the information that (groups of the) table entails relevant to a specific entity in context.
Answer:
The independent variable is excessive noice exposure
The dependent variable is hearing
Explanation:
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