Which of the Following Major Events of Prenatal Development Happens

question 6

Multiple Choice

Which of the following major events of prenatal development happens first?

• A)the eyes are fully open
• B)the body is covered with lanugo
• C)bone calcification begins
• D)the central nervous system begins to form
• E)meconium accumulates in the intestines

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Definitions:

Purines

Nitrogenous bases found in DNA and RNA that include adenine and guanine.

Pyrimidines

One of the two types of nitrogenous bases found in nucleic acids, characterized by a single ring structure, and includes cytosine, thymine (DNA only), and uracil (RNA only).

Semiconservative Replication

The process by which DNA duplicates itself, where each new DNA molecule consists of one old strand and one newly synthesized strand.

Parental Strand

The original strand of DNA that serves as a template for the production of its counterpart in DNA replication, ensuring genetic information is accurately passed on.