Most of the people with sicken multiple sclerosis have experienced vision difficulties. A vision problem is often one of the first symptoms of relapsing multiple sclerosis. It is a disease of the central nervous system which includes the optic nerve. Optic nerve transmits light and visual images to the brain. An inflammation of the optic nerve may cause a sudden loss of vision.
Dental caries are also known as cavities which is a hole/structural damage to the tooth do to decay.
dental caries require the attention of a dentist. they are generally drilled to removed decayed tooth and treated with a filling; however, if severe enough may required a root canal and crown or pulling of the tooth.
One reason is because they consist of many different types of tissues.
Answer:

Which statement best describes a scientific question?
- It must be based on a hypothesis.
- It must be testable
These are the correct Answers!
Explanation:
- A good scientific question has certain characteristics. It should have some answers should be testable it can be tested by another individual through an experiment or measurement.
Therefore, I hope this helps!
Answer:
A pair of homologous chromosomes is called Bivalents