When the heart begins to beat in the developing embryo,
A) it is usually during the fourthweek after conception.
B) the organism weighs a fraction of an ounce.
C) the organism is only two to three inches in length.
D) the endoderm is fusing with the ectoderm.

Question

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The Answer of When the heart begins to beat in the developing embryo,
A) it is usually during the fourthweek after conception.
B) the organism weighs a fraction of an ounce.
C) the organism is only two to three inches in length.
D) the endoderm is fusing with the ectoderm.

When the Heart Begins to Beat in the Developing Embryo