Answer: The central nervous system (CNS) is the collection of neurons that make up the brain and the spinal cord. The peripheral nervous system (PNS) is the collection of neurons that link the CNS to our skin, muscles, and glands. Neurons are specialized cells, found in the nervous system, which transmit information
Explanation:
A mutation is a rare, accidental or induced modification of genetic information (DNA or RNA sequence) in the genome.
The consequences of a mutation vary according to the part of the genome affected. A mutation is said to be hereditary if the mutated genetic sequence is passed on to the next generation.
In multicellular animals, germline mutations can be transmitted to offspring, whereas somatic mutations do.
Somatic mutations do not affect cells intended for reproduction, so they are never hereditary:
* Post-zygotic mutations are the mutations that appear in the egg after fertilization. They are rarer and are expressed as mosaic in the individual concerned (the mutation will be present only in the daughter cells originating from the mutated embryonic cell).
* Mutations can appear throughout life on the DNA of any cell; they are then transmitted to the line of the daughter cells. These can, in some cases, become tumor cells and then form cancer.
Cells were taken while she was being treated for cancer many years ago and these cells have been cultured in the lab ever since.
Answer:
Through a chemical process called "condensation". The addition of the two molecules typically proceeds in a step-wise fashion to the addition product, usually in equilibrium, and with loss of a water molecule.
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