A Key Event Occurring in the Second Week Following Fertilization

question 18

Multiple Choice

A key event occurring in the second week following fertilization is

• A)the implantation of the blastocyst in the endometrium.
• B)bones forming.
• C)the heart beginning to beat.
• D)the brain beginning to send out impulses.

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Definitions:

fMRI Machine

A device used in neuroimaging to measure and map brain activity through changes in blood flow.

Monozygotic

Referring to twins who originated from a single fertilized egg and are genetically identical.

DNA

Deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes, carrier of genetic information.

Evolutionary Advantage

A trait or characteristic that increases an organism's likelihood of survival and reproduction in its environment.