Answer: A
Explanation:
Karyotypes can be used to screen for and confirm chromosomal abnormalities such as Down's syndrome, and there are several different types of abnormalities which may be detected.
Simplest to complex: atoms, molecules, cells, tissue, organs, organ system, organism
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An antibody is also known as an immunoglobulin. It is a
glycoprotein that plays a critical role in the immune system by identifying and
destroying invading foreign particles such as viruses and microorganisms. Thereby,
antibodies protect people from disease and infection.
The zygote undergoes mitosis where it divides and doubles it's cells. This is called the germinal phase.
