The biological organisms resulting from the development of the zygote, until eight completed weeks after fertilization, are called what?

The biological organisms resulting from the development of the zygote, until eight completed weeks after fertilization, are called what?

• A. Embryo
• B. Embryo bank
• C. Embryo fragmentation
• D. Ejaculation

Answer: (A)

Early development naming: from fertilization to eight weeks is described as the embryo stage. After the egg is fertilized, the zygote begins dividing and forming the structures that give rise to all tissues and organs. This embryonic period includes the early formation of organs (organogenesis) and lasts until the end of the eighth week. From the ninth week onward, the developing organism is called a fetus. The other terms aren’t used to label this stage: a bank isn’t a developmental term, fragmentation refers to a process rather than a stage, and ejaculation is a reproductive act, not a developmental stage.

Early development naming: from fertilization to eight weeks is described as the embryo stage. After the egg is fertilized, the zygote begins dividing and forming the structures that give rise to all tissues and organs. This embryonic period includes the early formation of organs (organogenesis) and lasts until the end of the eighth week. From the ninth week onward, the developing organism is called a fetus. The other terms aren’t used to label this stage: a bank isn’t a developmental term, fragmentation refers to a process rather than a stage, and ejaculation is a reproductive act, not a developmental stage.