Answer:
An atom is the basic unit of a chemical element. Atoms are made out of three main parts: protons, neutrons and electrons. Protons and neutrons are contained inside the very center of the atom, which is called the nucleus.
Explanation:
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It’s when an uncomplimentary base in double-stranded DNA is caused by spontaneous deamination of cytosine or adenine. Also mismatching during homologous recombination, or any errors in DNA replication.
The answer is all of the above.
Cells are all similar, but still, they differ in size, shape, function. All of this depends on their role in the body. A blood cell, muscle cell, bone cell, for example, are similar enough on some basic level. Still, each of these cells is specialized to work in the special way the body needs to. They are all specialized for different functions.
A, meningeal blood vessels is the correct answer.
